Tag Archives: geology

Monongahela National Forest

Monongahela National Forest

West Virginia

Managed by U.S. Forest Service, Northern Region

1,706,898 acres (921,150 federal/ 785,748 other)

Website: https://www.fs.usda.gov/r09/monongahela

Overview

Monongahela National Forest contains the highest point in West Virginia, 4,863-foot-tall Spruce Knob with an observation tower for seeing over the trees at its summit.  It is part of Spruce Knob-Seneca Rocks National Recreation Area (see our full blog post), which is very popular with rock climbers.  The National Forest’s initial 7,200 acres were purchased by the federal government in 1915, and it the grew to 150,367 acres over the next decade.  During World War II, the U.S. Army utilized the area as an artillery and mortar range, in addition to training soldiers in climbing techniques at Seneca, Nelson, and Champe Rocks.  This area receives an average of 60 inches of annual precipitation on the west side of the Allegheny Front and only half that on the rain shadow side.  It is the headwaters of six major rivers: the Monongahela, Potomac, Greenbrier, Elk, Tygart, and Gauley.

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about all 155 National Forests.

Highlights

Spruce Knob-Seneca Rocks National Recreation Area, Cranberry Glades Botanical Area, Highland Scenic Highway, Lake Sherwood Recreation Area, Gaudineer Knob Scenic Area, Cassell Cave, Sinks of Gandy, Stuart Memorial Drive, Champe Rocks, Dolly Sods Scenic Area

Must-Do Activity

There are 94,991 acres in eight designated Wildernesses in Monongahela National Forest, more than half of which is in the Cranberry Wilderness.  A boardwalk traverses the bogs at Cranberry Glades Botanical Area, which has a visitor center run by the Forest Service.  Fishing is a popular pastime, especially at Lake Sherwood, Spruce Knob Lake, and Lake Buffalo.  When winter conditions are right, there is a snowmobile area on Highland Scenic Highway.  The forest is mostly second growth, but 318 acres of old-growth remains, which can be seen at Fanny Bennett Hemlock Grove, Gaudineer Scenic Area (for red spruce), Shavers Mountain Spruce-Hemlock Stand, North Fork Mountain Red Pine Botanical Area, North Spruce Mountain Old Growth Site, and Virgin White Pine Botanical Area.

Best Trail

There is great hiking in Spruce Knob-Seneca Rocks National Recreation Area, and other trails can be found at Lake Sherwood Recreation Area, Falls of Hill Creek Scenic Area, Mt. Porte Canyon, and Stuart Recreation Area.  The 17,371-acreDolly Sods Wilderness encompasses much of the Red Creek drainage with high-elevation bogs and heaths like those found in southern Canada.

Watchable Wildlife

It is hard to believe given their abundant numbers today, but in the 1930s white-tailed deer had to be reintroduced from Michigan.  In 1969, 23 fishers were reintroduced from New Hampshire.  Other large mammals include black bear, red and gray fox, coyote, bobcat, snowshoe hare, beaver, river otter, raccoon, mink, skunk, and opossum.  Of the 230 bird species identified, 159 are known to breed here.  Approximately 90% of the trout waters in West Virginia are within the National Forest, and trout are stocked at Spruce Knob Lake and other locations.

Photographic Opportunity

The iconic Seneca Rocks are a 900-foot-tall quartzite crag heavily used by rock climbers.  On October 22, 1987, a prominent pinnacle dubbed “the Gendarme” fell to the ground.

Peak Season

Summer

Fees

A day use fee applies at Lake Sherwood Recreation Area.

Road Conditions

Most roads are open year-round, including the paved road to the top of Spruce Knob when it is snow-free.

Camping

The National Forest has 23 campgrounds, including popular options in Spruce Knob-Seneca Rocks National Recreation Area at Seneca Shadows and Big Bend (with hot showers). 

Wilderness Areas

Big Draft Wilderness

Cranberry Wilderness

Dolly Sods Wilderness

Laurel Fork North Wilderness

Laurel Fork South Wilderness

Otter Creek Wilderness

Roaring Plains West Wilderness

Spice Run Wilderness

Related Sites

Allegheny National Forest (Pennsylvania)

George Washington National Forest (Virginia-West Virginia)

Jefferson National Forest (Virginia-West Virginia-Kentucky)

Harpers Ferry National Historical Park (West Virginia-Virginia-Maryland)

Nearest National Park

New River Gorge

Conifer Tree Species

eastern hemlock, balsam fir, red spruce, red pine, eastern white pine

Flowering Tree Species

black ash, mountain ash, black cherry, yellow birch, sugar maple, red maple, sweet birch, cucumber magnolia, American beech, basswood, speckled alder, mountain laurel, white rhododendron

Explore More – The Monongahela River gets its name from the Lenape language, and it translates as what in English?

Learn more about this and the 154 other National Forests in our new guidebook Out in the Woods

Sáttítla Highlands National Monument

Sáttítla Highlands National Monument

California

Managed by U.S. Forest Service, Pacific Southwest Region

Established 2025

224,676 acres

Website: https://www.fs.usda.gov/visit/national-monuments/sattitla-highlands-national-monument

Overview

In the northeast corner of California is the largest shield volcano in North America: 7,921-foot Medicine Lake Volcano.  Sáttítla Highlands National Monument is spread across Klamath, Shasta, and Modoc National Forests just south of Lava Beds National Monument and features numerous cinder cones and lava fields.  Part of the Volcanic Legacy Scenic Byway loops around Medicine Lake, which the Modoc people view as a place of healing.  The Pit River Tribe opposed development of geothermal energy sources in this area, spearheading its protection.  In the 1960s, NASA astronauts trained at Pumice Crater, four of whom eventually landed on the moon.  Sáttítla Highlands National Monument is also important for biodiversity, providing habitat for wildlife species like the Cascades frog, long-toed salamander, and gray-headed pika, as well as numerous fungi, the parasitic sugarstick plant, and Pacific fuzzwort (a rare liverwort).

Know someone who loves exploring new National Monuments? Gift them our book Monumental America: Your Guide to All 138 National Monuments that is available for sale on Amazon.com.

Highlights

Medicine Lake Recreation Area, Giant Crater lava tube, Glass Mountain, Black Lava Butte, Fourmile Hill Tree Molds Geologic Area

Must-Do Activity

Most of the developed recreation opportunities surround Medicine Lake, which offers boat ramps, trails, and campgrounds.  Giant Crater has the longest known lava tube system in the world at 18 miles, although it is partially collapsed.  This Geologic Special Interest Area can be accessed two miles off Medicine Lake Road on Forest Road 43N11.  Another unpaved road leads up Glass Mountain, which has a crater full of sharp pieces of rhyolite obsidian and glossy dacite.  This remote corner of California has some of the darkest skies in the continental U.S., so it is great for stargazing on moonless nights.  In the winter, snowmobiling and cross-country skiing are popular activities on groomed trails. 

Best Trail

There is a 4.4-mile loop around Medicine Lake, as well as the one-mile out-and-back Medicine Lake Glass Flow Trail that gains 68 feet of elevation on the north shore.  For a more challenging route, Little Mt. Hoffman Trail gains 666 feet over three miles to the fire lookout, which can be rented overnight.  Summitting the actual Mt. Hoffman is over 13 miles roundtrip with a 2,000-foot cumulative climb.

Photographic Opportunity

Sáttítla literally translates as “obsidian place” and the volcanic glass prevalent at Glass Mountain has provided humans sharp blades for at least 5,000 years.

Peak Season

Summer

Fees

$5 per vehicle (or the America the Beautiful Pass) at Medicine Lake

Road Conditions

This area receives abundant winter snowfall, and roads can be blocked by snow into July, which we experienced trying to get to Glass Mountain.  The road to Medicine Lake is paved, but almost every other road through the National Monument is unpaved, some requiring a high-clearance vehicle. 

Camping

There are multiple Forest Service campgrounds on Medicine Lake, plus two nearby at Blanche Lake and Bullseye Lake.  Dirt roads in Modoc, Shasta, and Klamath National Forests have ample dispersed camping opportunities.

Related Sites

Lava Beds National Monument (California)

Tule Lake National Monument (California)

Lassen National Forest (California)

Berryessa Snow Mountain National Monument (California)

Nearest National Park

Lassen Volcanic

Explore More – Sáttítla translates as “obsidian place” from which indigenous language?

Learn more about the other 137 National Monuments in our book Monumental America: Your Guide to All 138 National Monuments

Modoc National Forest

Modoc National Forest

California

Managed by U.S. Forest Service, Pacific Southwest Region

1,979,327 acres (1,663,401 federal/ 315,926 other)

Website: https://www.fs.usda.gov/r05/modoc

Overview

In the northeast corner of California, Modoc National Forest contains the largest shield volcano in North America: 7,921-foot Medicine Lake Volcano.  This region has a long history of volcanism, as seen at Pumice Stone Mountain, Burnt Lava Flow, High Hole Crater, Hot Spot, and Glass Mountain (composed of rhyolite obsidian and glossy dacite).  The basalt-topped plateau of Devil’s Garden is home to an 800-acre stand of western juniper.  East of Goose Lake, the Warner Mountains rise from 4,300 feet to 9,892-foot Eagle Peak, and are covered by a mixed conifer forest of lodgepole pine, whitebark pine, ponderosa pine, incense-cedar, and red fir. 

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about all 155 National Forests.

Highlights

Sáttítla Highlands National Monument, Volcanic Legacy Scenic Byway, Medicine Lake Recreation Area, Glass Mountain, Devil’s Garden Natural Area, Mill Creek Falls, Highgrade National Recreation Trail, Pine Creek Trail

Must-Do Activity

Medicine Lake offers boat ramps, trails, and campgrounds and nearby is Giant Crater, which has the longest known lava tube system in the world at 18 miles (although it is partially collapsed).  Located up a dirt road often blocked by snowdrifts late into the summer, Glass Mountain has a crater full of sharp pieces of rhyolite obsidian and glossy dacite.  This remote corner of California has some of the darkest skies in the continental U.S., so it is great for stargazing on moonless nights.  In the winter, snowmobiling and cross-country skiing are popular activities on groomed trails.  The South Warner Mountain Wilderness is traversed by the 21-mile Summit Trail that passes Eagle Peak, the Devil’s Knob, and The Slide. Mill Creek Falls is also in the Warner Mountains, accessed by a 3.4-mile out-and-back trail.

Best Trail

In the Warner Mountains near the border with Oregon’s Fremont National Forest, the 5.5-mile one-way Highgrade National Recreation Trail provides excellent views of Goose Lake.  The trailhead is reached by taking paved County Road 9 five miles east from Highway 395 then turning north on the steep and unpaved Del Pratt Spring Road (Forest Road 47N72) for 6.3 miles.  The trail quickly leaves the shade of the forest as it steadily climbs 800 feet through a slope covered in woolly mule’s ears flowers to a saddle west of 8,224-foot Mt. Vida.  It is possible to summit Mt. Vida from this point, but the trail heads away toward Yellow Mountain following Forest Road 48N10.

Watchable Wildlife

Modoc National Forest borders Lower Klamath National Wildlife Refuge, in addition to Tule Lake, Clear Lake, and Modoc National Wildlife Refuges.  These wetlands provide habitat crucial for bird nesting and migration on the Pacific Flyway.  The many lava tubes provide habitat for numerous species of bats, in addition to violet-green swallows and bushy-tailed woodrats.  Larger mammals include mule deer, pronghorn, badger, skunk, raccoon, pika, jackrabbit, yellow-bellied marmot, coyote, bobcat, and mountain lion.  Large birds found here are great horned owl, short-eared owl, and bald eagle (winter resident).  Reptiles are abundant, including the western fence lizard, northern sagebrush lizard, western skink, Rocky Mountain rubber boa, gopher snake, desert night, and western rattlesnake.

Photographic Opportunity

Not far up the steep Highgrade National Recreation Trail there are excellent views of Goose Lake to the west.

Peak Season

Summer

Fees

$5 per vehicle (or the America the Beautiful Pass) at Medicine Lake

Road Conditions

This area receives abundant winter snowfall, and roads can be blocked by snow into July, which we experienced trying to get to Glass Mountain.  The road to Medicine Lake is paved, but almost every other road through the National Monument is unpaved, some requiring a high-clearance vehicle.  Giant Crater is a Geologic Special Interest Area that can be accessed two miles off Medicine Lake Road on Forest Road 43N11. 

Camping

There are multiple Forest Service campgrounds on Medicine Lake, plus two nearby at Blanche Lake and Bullseye Lake.  Dirt roads in Modoc National Forest provide ample dispersed campsites.

Wilderness Areas

South Warner Wilderness

Related Sites

Lava Beds National Monument (California)

Tule Lake National Monument (California)

Sáttítla Highlands National Monument (California)

Butte Valley National Grassland (California)

Nearest National Park

Lassen Volcanic

Conifer Tree Species

ponderosa pine, whitebark pine, red fir, incense-cedar, white fir, lodgepole pine, western white pine, Jeffrey pine, incense-cedar, western juniper

Flowering Tree Species

quaking aspen, curlleaf mountain mahogany, elderberry, sagebrush

Explore More – The Modoc Tribe traditionally lived in this area and the Klamath called them “Moadok Maklaks” that translates as what?

Learn more about this and the 154 other National Forests in our new guidebook Out in the Woods

Medicine Bow National Forest

Medicine Bow National Forest

Wyoming

Managed by U.S. Forest Service, Rocky Mountain Region

1,403,892 acres (1,096,885 federal/ 307,007 other)

Website: https://www.fs.usda.gov/r02/mbrtb

Overview

Medicine Bow National Forest is spread across three separate units in southern Wyoming and another located to the north between the cities of Laramie and Casper.  Within the latter unit is 10,272-foot Laramie Peak, a major landmark along the historic Oregon Trail.  Snowy Range Scenic Byway (Highway 130) provides access in the summer to the high-elevation recreational opportunities found in the mountains.  In 1995, Medicine Bow National Forest was administratively combined with Routt National Forest and Thunder Basin National Grassland.

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about this and the 154 other National Forests.

Highlights

Snowy Range Scenic Byway, Brooklyn Lake Campground, Medicine Bow Peak, Lake Marie, Sierra Madres, Aspen Alley, Hog Park Reservoir, Happy Jack Recreation Area, Vedauwoo, Laramie Peak Trail, Continental Divide National Scenic Trail

Must-Do Activity

Medicine Bow Peak stands at 12,013 feet within the Snowy Range near the Wyoming-Colorado border and has two steep, rocky trails to its summit which can be combined into a long loop.  The 29-mile-long Snowy Range Scenic Byway cuts across this rugged landscape and is a great place for summer camping, fishing, hiking, horseback riding, mountain biking, and backpacking.  The road closes in the winter, but is still a destination for snowmobiling, downhill skiing, cross-country skiing, and snowshoeing.  Medicine Bow gets its name from annual tribal gatherings when ceremonies were held and mountain mahogany was gathered for bow making.

Best Trail

Vedauwoo Recreation Area is visible from Interstate 80 between Laramie and Cheyenne, but feels worlds apart.  Its maze of boulders is a fun place to visit in the winter or summer (when the campground is open).  The 3.2-mile Turtle Rock Trail circles the area, but it is more fun to climb around off trail.  Near the end of winter, snow drifts pile six-feet-high next to ground swept bare.  In the glens protected by the 200-foot-tall rock outcrops, snowflakes cling to the bare branches of aspen and maple trees, and stick in the needles of junipers, Douglas-firs, and ponderosa pines.  Vedauwoo is an Arapaho word meaning “earthborn,” also the name of a nature spirit character in summer theater performances held here in the 1920s by the University of Wyoming.  This forest was once depleted for telegraph poles and railroad ties before the Civilian Conservation Corps (CCC) planted 280,000 trees in the 1930s.  It was used for over 50 years of military target practice, significant because there are unexploded munitions still in the ground.  Vedauwoo is located near the Happy Jack Recreation Area, which at 8,640 feet is the highest point along Interstate 80 between San Francisco and New York City.  This cross-country road was originally called the Lincoln Highway, hence the giant sculpture of Abraham Lincoln’s head at the nearby rest area. 

Watchable Wildlife

After a cold day on the National Forest’s cross-country ski trails at Brush Creek (built in the 1930s by the Civilian Conservation Corps) or Chimney Park, we always made it a point to stop in Saratoga where hot springs water is piped into the free outdoor Hobo Pool adjacent to the North Platte River.  This area is a favored wintering ground for bald and golden eagles, so you may witness a flyover during your soak.  Also watch for mule deer in town and a variety of waterfowl along the river.  Moose, elk, and pronghorn (at lower elevations) are found in the National Forest.  Black bears, mountain lions, coyotes, and red foxes reside here, too.  Trout fishing in lakes and streams is a major draw to the mountains. 

Photographic Opportunity

Lake Marie along the Snowy Range Scenic Byway is one of the most widely used photographs for tourism publications in this corner of Wyoming.

Peak Season

Summer

Fees

Day use fees of $5 per vehicle (or America the Beautiful pass) apply at Vedauwoo, Tie City Trailhead, Happy Jack Trailhead, and the western terminus of Headquarters National Recreation Trail, as well as Sugarloaf and West Lake Marie Trailhead along Snowy Range Scenic Byway.

Road Conditions

The gravel Vedauwoo Road (closed in spring) is good enough for RVs, as are some of the side roads off paved Snowy Range Scenic Byway (closed in winter).  Beware the rutted Forest Road 336 near Libby Flats and some other four-wheel-drive-only routes.  Several roads become snowmobile routes in the winter, including most of Snowy Range Scenic Byway west of the ski resort.

Camping

In addition to a large designated campground at the Vedauwoo exit off Interstate 80, Vedauwoo Road has designated free campsites marked by a post and offer dispersed camping along other surrounding roads.  Brooklyn Lake is one of several designated campgrounds along the Snowy Range Scenic Byway where dispersed campsites are harder to find.  Between Casper and Cheyenne, Laramie Peak dominates the prairie landscape and if you hike to its summit you can overlook hundreds of miles of the historic Oregon Trail.  Although much of this section of forest has been affected by wildfires, there is still plenty of natural beauty and out of the way places to pitch a tent along its labyrinthine road system. 

Wilderness Areas

Encampment River Wilderness

Huston Park Wilderness

Platte River Wilderness (also in Routt National Forest)

Savage Run Wilderness

Related Sites

Fort Laramie National Historic Site (Wyoming)

Thunder Basin National Grassland (Wyoming)

Scotts Bluff National Monument (Nebraska)

Nearest National Park

Rocky Mountain

Conifer Tree Species

Engelmann spruce, Douglas-fir, subalpine fir, lodgepole pine, limber pine, ponderosa pine, Rocky Mountain juniper

Flowering Tree Species

quaking aspen, eastern cottonwood, balsam poplar, Rocky Mountain maple, curlleaf mountain mahogany, sagebrush               

Explore More – Near Vedauwoo, a 60-foot-tall granite pyramid was built in 1882 to honor whom?

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about this and the 154 other National Forests.

Mark Twain National Forest

Mark Twain National Forest

Missouri

Managed by U.S. Forest Service, Eastern Region

3,012,464 acres (1,491,840 federal/ 1,520,624 other)

Website: https://www.fs.usda.gov/r09/marktwain

Overview

In the 1970s, the more northerly Clark National Forest in Missouri was administratively combined with Mark Twain National Forest, encompassing 11% of the state’s forests across 29 counties.  Much of the forest was planted by the Civilian Conservation Corps (CCC), with their work still visible at the Rolla Ranger Station and Winona Ranger Station Historic Districts.  Spread across nine separate units throughout southern Missouri’s Ozark Mountains, Mark Twain National Forest’s Karst topography is full of caves, sinkholes, streams, and springs.  Greer Spring is the second largest in Missouri with a daily flow of 222-million gallons as it drains 1.25 miles into the Eleven Point National Scenic River.  Greer Spring is accessible by a one-mile trail downhill from Highway 19, but no fishing or wading is allowed.

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about this and the 154 other National Forests.

Highlights

Glade Top Trail Scenic Byway, Blue Buck Knob Scenic Byway, Greer Spring, Table Rock Lake, Council Bluff Recreation Area, Overcup Oak Sink, Silver Mine Recreation Area, Bellevue Trail, Cedar Creek Trail, Devil’s Backbone Trail, Ridge Runner National Recreation Trail, Big Piney Trail, Ozark Trail

Must-Do Activity

Most trails in Mark Twain National Forest are open to hikers, mountain bikers, and equestrians, including Ridge Runner National Recreation Trail that totals 33 miles.  Two areas at Chadwick and Sutton Bluff are designated for ATV, UTV, and motorcycle use.  Fishing is a popular activity on the Eleven Point National Scenic River and numerous lakes, like Noblett Lake and Table Rock Lake.  There are so many recreation areas spread around this massive National Forest, it is impossible to cover them all here.  We recommend you start with one of the spots listed under Highlights above.

Best Trail

Mark Twain National Forest has several long trails that explore its 78,000 acres of Wilderness areas, including sections of the 350-mile Ozark Trail.  Northeast of Branson, Hercules-Glades Wilderness protects 12,413 acres of forested hillsides, limestone outcroppings, and glades of native grasses.  There are three trailheads on the edge of the Wilderness, but we chose Blair Ridge because of its paved access 5.3 miles off Highway 160.  From a small roadside parking area, the trail follows a ridgeline for 1.2 miles to some excellent backpacking campsites that overlook the countryside before it drops 600 feet in the next mile.  At that point the trail intersects with Coy Bald Trail, which can be taken a short distance to a small scenic waterfall on Long Creek.

Watchable Wildlife

The Ozark Mountains provide habitat for common eastern species like white-tailed deer, wild turkeys, gray squirrels, cottontail rabbits, red foxes, and raccoons.  You may also encounter venomous copperheads, timber rattlesnakes, and pygmy rattlesnakes.  The oak savannahs are home to several endemic plants, as well as prickly pear cacti and animals more associated with the Southwest U.S., like roadrunners, collared lizards, scorpions, and tarantulas.  Gamefish include smallmouth bass, largemouth bass, rock bass, walleye, and rainbow trout.

Photographic Opportunity

Between Jefferson City and Columbia, Pine Ridge Recreation Area accesses Cedar Creek Trail, which has multiple trailheads and four loops totaling 36 miles.

Peak Season

Spring and fall

Fees

There are day use fees at several sites, including $5 at Noblett Lake and $2 at Blue Hole Trailhead and North Fork Recreation Area

Road Conditions

Many of the curvy back roads in Mark Twain National Forest are paved, such as Blair Ridge that led to a trailhead 5.3 miles off Highway 160.  There are likely some rough unpaved roads in the Ozarks, so check road conditions before departing.

Camping

There are numerous campgrounds in Mark Twain National Forest, although it can be harder to find good dispersed campsites due to the proximity to private land.  In the northernmost area outside Columbia, we paid to camp in the quiet Pine Ridge Recreation Area.  On the edge of the Hercules-Glades Wilderness at the Hercules Tower (with restrooms) and Coy Bald Trailheads, there are a handful of car camping sites for free. 

Wilderness Areas

Bell Mountain Wilderness

Devils Backbone Wilderness

Hercules-Glades Wilderness

Irish Wilderness

Paddy Creek Wilderness

Piney Creek Wilderness

Rockpile Mountain Wilderness

Related Sites

Ozark National Scenic Riverways (Missouri)

George Washington Carver National Monument (Missouri)

Ozark National Forest (Arkansas)

Nearest National Park

Gateway Arch

Conifer Tree Species

shortleaf pine, eastern redcedar

Flowering Tree Species

sweetgum, water tupelo, sugar maple, red maple, boxelder, honeylocust, Ohio buckeye, red buckeye, black cherry, sassafras, persimmon, Kentucky coffee tree, black gum, blackjack oak, Nuttall oak, overcup oak, white oak, black oak, scarlet oak, post oak, black hickory, shagbark hickory, mockernut hickory, bitternut hickory, brookside alder

Explore More – Mark Twain National Forest’s Greer Spring is the second largest natural spring in Missouri, so which one is in first place?

Know someone who loves the National Forests? Gift them our travel guidebook Out in the Woods so they can learn more about this and the 154 other National Forests.