South Beartooth Highway

The South Beartooth Highway roadless area encompasses 105,570 acres of the Shoshone National Forest in the Beartooth Mountains of Wyoming, where terrain rises from canyon floors near 6,400 feet to alpine summits exceeding 12,700 feet. The Beartooth Mountains form the dominant ridge system, with Beartooth Peak reaching 12,799 feet and Sawtooth Mountain at 11,484 feet. Water originates across this high terrain and flows through multiple drainages: Littlerock Creek, Beartooth Creek, Crandall Creek, Sunlight Creek, and Bennett Creek all feed the Clarks Fork Yellowstone River, which drains the western portion of the area through Clarks Fork Canyon. The landscape's steep relief creates distinct moisture and temperature gradients that shape vegetation patterns from the lowest canyons to the highest ridges.

The forest transitions across elevation zones from lower montane to alpine. Lodgepole pine (Pinus contorta) and Engelmann spruce (Picea engelmannii) dominate mid-elevation slopes, with subalpine fir (Abies lasiocarpa) becoming increasingly prevalent at higher elevations. The federally threatened whitebark pine (Pinus albicaulis) occurs in the subalpine zone, where it shares the canopy with Engelmann spruce. At treeline and above, the forest gives way to alpine meadows and tundra communities where low-growing species prevail: Arctic willow (Salix arctica), shrubby cinquefoil (Dasiphora fruticosa), Ross' avens (Geum rossii), Hayden's clover (Trifolium haydenii), and mountain Labrador tea (Rhododendron neoglandulosum) form the herbaceous and dwarf shrub layers. Sky pilot (Polemonium viscosum) and elephant's-head lousewort (Pedicularis groenlandica) occur in moist alpine meadows, while grouse whortleberry (Vaccinium scoparium) carpets forest understories at higher elevations.

Large carnivores structure the ecology of this high-elevation landscape. The federally threatened Canada lynx (Lynx canadensis) hunts American pika (Ochotona princeps) and yellow-bellied marmots (Marmota flaviventris) across alpine and subalpine terrain. The federally threatened grizzly bear (Ursus arctos horribilis) forages on marmots and roots in alpine meadows and on slopes. The federally threatened North American wolverine (Gulo gulo luscus) ranges across the highest ridges and talus fields. In the alpine zone, black rosy-finches (Leucosticte atrata), endangered (IUCN), forage on insects and seeds, while Clark's nutcrackers (Nucifraga columbiana) cache whitebark pine seeds in the subalpine forest. Mountain goats (Oreamnos americanus) occupy steep rocky terrain above treeline. In the creek systems, Rocky Mountain cutthroat trout (Oncorhynchus virginalis) inhabit cold headwater streams. Suckley's cuckoo bumble bee (Bombus suckleyi), proposed for federal endangered status, pollinates alpine wildflowers during the brief growing season.

A visitor ascending from Clarks Fork Canyon at 6,400 feet enters dense lodgepole and spruce forest, where the sound of water echoes through the canyon walls. As elevation increases through Dillworth Bench and toward the higher ridges, the forest opens and transitions to subalpine fir and whitebark pine. The understory shifts from dense shade to scattered grouse whortleberry and herbaceous plants. Crossing into Sawtooth Meadows at 9,600 feet, the forest thins dramatically, and alpine tundra dominates the landscape. Here, low-growing willows and cinquefoil replace tall conifers, and the view extends across the Beartooth Mountains to distant peaks. The air cools noticeably, and the wind increases. On the highest ridges—Bald Peak, Table Mountain, and the summit of Beartooth Peak—only the hardiest alpine plants survive, and the landscape becomes a mosaic of bare rock, talus, and sparse vegetation. The streams that drain these heights—Littlerock Creek, Beartooth Creek, and others—carry cold, clear water downslope toward the Clarks Fork, completing the hydrologic cycle that connects the highest alpine zone to the canyon floors below.

The Beartooth and Absaroka Mountains have sustained human presence for thousands of years. The Tukudika, or "Mountain Shoshone," inhabited the high-altitude ranges, with archaeological evidence of occupation extending back 8,000 to 12,000 years. Unlike the horse-mounted Plains Shoshone, the Tukudika traveled on foot and used domesticated dogs as pack animals to navigate the rugged terrain. They hunted bighorn sheep for meat, hides, and horn used in composite bows, and extracted obsidian and soapstone from local deposits for tools and vessels. High-altitude lakes and streams provided trout. The Crow, including the Mountain Crow and Kicked in the Bellies bands, utilized the ranges for hunting, gathering, and vision quests. The Nez Perce historically used the area as a trans-mountain route to access bison hunting grounds in the Bighorn Basin. The Bannock and Lemhi Shoshone traveled the "Bannock Trail" through the northern Yellowstone and Beartooth region as a seasonal hunting corridor. These mountains remain sacred sites for vision quests and spiritual healing.

In the early nineteenth century, fur trappers and mountain men, including John Colter in 1807 and Jim Bridger, used the Clarks Fork River as a travel corridor. In 1881, Civil War General Philip Sheridan led a 120-man expedition across the Beartooth Mountains to forge a trail to Cooke City, marking the first recorded passage by a large government expedition over terrain considered impassable. In 1877, during the Nez Perce War, Chief Joseph and his followers retreated through the nearby Absaroka Range, exiting via the Clarks Fork of the Yellowstone River while pursued by U.S. Cavalry.

The Shoshone National Forest was established on March 30, 1891, as the Yellowstone Park Timberland Reserve by presidential proclamation signed by President Benjamin Harrison under Section 24 of the Forest Reserve Act of March 3, 1891. It was the first federally protected forest reserve in the United States, created to protect timber from destruction and ensure water flow. On July 1, 1908, Executive Order 895 formally established the Shoshone National Forest from lands formerly part of Yellowstone National Forest, with headquarters in Cody, Wyoming. In 1945, the Washakie National Forest was discontinued as a separate entity and its 866,263 acres were added to the Shoshone, which now encompasses approximately 2,469,248 acres. Large portions of the forest were subsequently protected under the Wilderness Act of 1964 and later legislation.

The region surrounding the roadless area experienced significant industrial development. To the east, the Red Lodge area became a major coal mining hub starting in 1886 with the Rocky Fork Coal Company. The Cooke City mining district, to the northeast, created demand for transportation infrastructure. The most substantial industrial undertaking in the immediate area was construction of the Beartooth Highway from 1932 to 1936, a Great Depression-era project that employed thousands of workers using steam shovels, draglines, and manual labor to carve the route through granite and glacial debris. In 1931, President Herbert Hoover signed the National Park Approaches Act to fund this road as a park approach to Yellowstone. In 2014, the adjacent Beartooth Highway (Red Lodge–Cooke City Approach Road Historic District) was added to the National Register of Historic Places, recognizing this engineering accomplishment. The Chief Joseph Scenic Byway follows the historical flight path from 1877.

Vital Resources Protected

Alpine Headwater Protection for Wyoming's Premier Coldwater Fishery

This roadless area contains the headwaters of the Clarks Fork of the Yellowstone River—Wyoming's only designated Wild and Scenic River—and feeds critical spawning and rearing habitat for Yellowstone cutthroat trout throughout the drainage. The high-elevation terrain (peaks exceeding 12,700 feet) creates a natural filtration and temperature regulation system: snowmelt from persistent spring snowpack maintains cold, clear water conditions essential for cutthroat trout reproduction. Road construction in headwater zones directly increases sedimentation and stream temperature, degrading the spawning substrate and thermal refugia that this species depends on, particularly as climate warming already stresses alpine aquatic systems.

Denning and Movement Corridor for High-Elevation Carnivores

The Beartooth Plateau's persistent spring snowpack and subalpine fir-spruce forest create irreplaceable denning habitat for North American wolverines (federally threatened), which require deep, stable snow for maternal dens and depend on the area's elevational connectivity to access prey across the Greater Yellowstone Ecosystem. Canada lynx (federally threatened) occupy the subalpine forest matrix here, where dense spruce-fir cover provides hunting grounds for snowshoe hares and protection from competing predators. Grizzly bears (federally threatened) use the high-elevation terrain as secure habitat and movement corridors between the Greater Yellowstone Ecosystem's core areas. The unfragmented, roadless character of this landscape is the mechanism that allows these wide-ranging carnivores to move without encountering roads—once fragmented by road networks, these populations face increased mortality from vehicle strikes, habitat isolation, and human-wildlife conflict.

Whitebark Pine Stronghold in a Climate-Stressed Ecosystem

Whitebark pine (federally threatened) persists across the South Beartooth's high-elevation slopes, where it provides critical food for grizzly bears (via pine nuts) and stabilizes alpine soils. The species is already declining across the region due to mountain pine beetle outbreaks and white pine blister rust, both exacerbated by warming temperatures. This roadless area's intact forest structure and lack of fragmentation preserve the genetic diversity and ecological function of remaining whitebark pine populations—conditions that cannot be restored once roads introduce edge effects, canopy opening, and accelerated warming.

Pollinator and Songbird Habitat in the Greater Yellowstone Ecosystem

The area supports populations of Suckley's cuckoo bumble bee (proposed endangered), which depends on native wildflower communities in alpine and subalpine meadows (including Sawtooth Meadows at 9,600 feet), and black rosy-finches (endangered, IUCN), which breed on high-elevation rocky slopes and feed on alpine insects. Monarch butterflies (proposed threatened) use the area during migration, relying on intact vegetation corridors and the absence of fragmentation. Road construction fragments these habitat networks and introduces invasive plant species that displace native wildflowers, directly reducing food availability for these species.

Threats from Road Construction

Sedimentation and Temperature Increase in Headwater Streams

Road construction on steep alpine and subalpine terrain generates chronic erosion from cut slopes and exposed fill, delivering fine sediment into the drainage network that feeds the Clarks Fork of the Yellowstone River and its tributaries (Littlerock Creek, Beartooth Creek, Crandall Creek, Sunlight Creek, Bennett Creek, Deep Creek). Removal of forest canopy along road corridors increases solar radiation reaching streams, raising water temperatures in a system already stressed by climate warming. Together, these mechanisms degrade spawning substrate for Yellowstone cutthroat trout and reduce the cold-water refugia that this species requires to survive summer conditions—impacts that persist for decades after road construction ceases.

Habitat Fragmentation and Predator Access for Lynx and Wolverine

Road construction breaks the continuous subalpine forest and high-elevation terrain that Canada lynx and North American wolverines require for unimpeded movement and hunting. Snow compaction from road maintenance and winter vehicle use creates packed corridors that allow competing predators (coyotes, foxes) to access areas previously inaccessible to them, reducing lynx hunting success and increasing predation risk for wolverine kits. For wolverines specifically, roads crossing persistent snowpack areas disrupt denning habitat and increase vehicle strike mortality during spring emergence—a critical vulnerability for a species with extremely low reproductive rates.

Invasive Species Establishment Along Road Corridors

Road construction creates disturbed soil and edge habitat that invasive plants exploit; the Shoshone National Forest targets approximately 1,500 acres annually for invasive species treatment forest-wide, and invasive species are documented as spreading via motorized recreation corridors. In the South Beartooth area, invasive plants would establish along road margins and spread into adjacent alpine meadows (including Sawtooth Meadows), displacing native wildflowers that are the primary food source for Suckley's cuckoo bumble bee and black rosy-finches. Once established at high elevation, invasive species are extremely difficult to control due to harsh growing conditions that limit treatment options.

Loss of Elevational Connectivity and Climate Refugia Function

The South Beartooth's roadless condition preserves a continuous elevational gradient from 6,400 feet (Clarks Fork Canyon) to 12,799 feet (Beartooth Mountains)—a connectivity that allows species to shift their ranges upslope as climate warms, maintaining access to cooler microclimates. Road construction fragments this gradient, isolating high-elevation populations of whitebark pine, alpine wildflowers, and cold-water fish populations from lower-elevation refugia and genetic sources. For species already stressed by climate change (whitebark pine, Yellowstone cutthroat trout, wolverines dependent on spring snowpack), this fragmentation eliminates the adaptive capacity to track shifting climate conditions—a loss that cannot be reversed.

The South Beartooth Highway roadless area spans 105,570 acres of alpine and subalpine terrain in the Shoshone National Forest, with elevations ranging from 6,400 feet in Clarks Fork Canyon to 12,799 feet at Beartooth Mountain. The area's roadless character—its network of native-surface trails, undisturbed watersheds, and absence of motorized access in the backcountry—defines the quality of recreation here. Once roads fragment this landscape, the quiet backcountry experience and wildlife habitat that make these mountains distinctive would be permanently altered.

Hiking and Horseback Riding

The Beartooth Loop trails form the backbone of backcountry travel here. The High Line Trail (613) follows the Continental Divide for 8.3 miles, offering alpine tundra views and access to the Line Creek Plateau Research Natural Area, where high-altitude Rocky Mountain alpine vegetation is protected. Connected segments include the Dollar Lake Trail (613.1, 3.7 miles), Houser Lake Trail (629, 4.4 miles), and Stockade Lake Trail (613.1A, 1.9 miles)—all native-surface routes used primarily for horseback riding and hiking. The Tolman Mountain Trail (613.1C, 5.0 miles) and Little Rock Creek Trail (613.1B, 4.0 miles) extend the loop system across the high country.

The Clarks Fork Trail (628, 17.1 miles) is the area's premier non-motorized route, rated moderate to difficult. It runs along the north side of the Clarks Fork of the Yellowstone, a 20.5-mile segment designated as a National Wild and Scenic River. Hikers and riders on this trail encounter the river's defining feature: The Box, a deep technical canyon with 4,000-foot walls, waterfalls, and whitewater cascades. The Clarks Fork Cutoff Trail (628.1A, 1.3 miles) provides a shorter connection. Access to the Clarks Fork system is via the Clarks Fork Trailhead or Clarks Fork Canyon Motorized Trailhead; Forest Road 119 to this area is rough and unsuitable for large trailers.

The Deep Lake Trail (623, 2.8 miles) and Deep Creek Trail (613.1D, 2.2 miles) access high-altitude lakes and streams. The Line Creek Plateau Trail (10, 7.9 miles) reaches the Line Creek Plateau Research Natural Area, used for alpine revegetation research and accessible from the Line Creek Plateau Trailhead. The Dead Indian Gulch Trail (761.1, 4.7 miles) provides access from the Chief Joseph Scenic Byway corridor. Trailheads at North Crandall, Morrison Jeep, and Lodgepole offer additional entry points.

Established campgrounds at Island Lake, Lake Creek, Hunter Peak, and Beartooth Lake support extended trips. The roadless condition preserves the quiet, undisturbed character of these trails—once roads are built, the backcountry experience and the integrity of the Clarks Fork Wild and Scenic River corridor would be compromised.

Hunting

The area supports all major big game species native to Wyoming: mule deer, elk, pronghorn antelope, bighorn sheep, moose, and black bear. Upland birds include sage grouse, blue grouse, and ruffed grouse; small game includes cottontail rabbit, snowshoe hare, and squirrels. The general big game season runs September 15 to November 15 (60 days). Spring black bear season is April 15 to June 15; fall black bear season is August 1 to November 15. Archery seasons begin as early as August 15 for antelope and moose, with September seasons for deer and elk.

Nonresident hunters must hire a licensed outfitter or guide to hunt in designated wilderness areas. The area is prime grizzly bear habitat within the Greater Yellowstone Ecosystem, and mandatory food storage regulations are in effect at all campgrounds and backcountry sites. Hunters must use bear-resistant containers or backcountry storage boxes for food, garbage, and animal carcasses. Recent human-bear conflicts have been documented on the Deep Lake Trail.

Access for hunters is via the Beartooth Highway (US 212, open Memorial Day through October), the Chief Joseph Scenic Byway (Highway 296), and backcountry routes including Dead Indian Creek and Sunlight Creek crossings. The roadless condition ensures that hunting pressure remains dispersed across a large, unfragmented landscape—road construction would concentrate access, increase harvest pressure, and degrade the remote character that defines hunting here.

Fishing

The Clarks Fork of the Yellowstone River is the primary fishery, supporting Yellowstone cutthroat trout (native), Snake River cutthroat trout, rainbow trout, brown trout, rainbow-cutthroat hybrids, grayling, and mountain whitefish. From the Wyoming-Montana state line downstream to the Shoshone National Forest boundary, fishing is restricted to artificial flies and lures only. The creel limit for most streams in the area is three trout, with no more than one exceeding 16 inches.

Beartooth Lake is stocked annually with approximately 2,750 rainbow trout and 2,750 cutthroat trout and supports brook trout and a small population of lake trout. Beartooth Creek, Sunlight Creek, Dead Indian Creek, and Littlerock Creek are documented fishable streams. The Wyoming Game and Fish Department manages an alpine lake stocking program, with approximately 60–70 lakes in the region stocked annually via helicopter. Many high-country lakes are self-sustaining, often resulting in high populations of smaller fish.

Fishing season is generally year-round, with best conditions from late June through late August when high-altitude waters are thawed. Access is via the Beartooth Highway to Beartooth Lake and trailheads, the Chief Joseph Scenic Byway (Highway 296) paralleling the Clarks Fork River, and the Beartooth Loop and Clarks Fork trailheads. The Clarks Fork is Wyoming's only designated Wild and Scenic River, noted for pocket water that rewards adventurous anglers and trout exceeding 18 inches in lower sections. The roadless condition preserves cold, undisturbed headwater streams and the integrity of native cutthroat populations—road construction would fragment spawning habitat and increase sedimentation.

Birding

The area is documented as a location for Black Rosy-Finch, a high-alpine specialty found in rocky tundra and snowfields above 10,000 feet. Horned Larks are the most common birds in dry tundra habitats such as the Hellroaring Plateau (9,600–10,500 ft). American Pipits, Clark's Nutcrackers, American Three-toed Woodpeckers, Mountain Chickadees, Red-breasted Nuthatches, and Pine Grosbeaks are found in subalpine forest and tundra zones. American Dippers are documented along high-mountain streams and near waterfalls like Beartooth Falls.

The primary birding window is late June through August, when breeding songbirds are most active and high-elevation areas are accessible. The Beartooth Loop National Recreation Trail, starting near 10,536 feet, provides access to alpine tundra and lake habitats. Gardner Lake Overlook and Trail (1.6 miles round-trip) descends into a glacial cirque suitable for viewing alpine species. Beartooth Lake and Island Lake offer riparian and lakeside birding at approximately 9,000 feet. The Clarks Fork Overlook is a designated observation site for soaring raptors like Golden Eagles. The roadless condition maintains interior forest habitat and undisturbed alpine tundra—road construction would fragment breeding territories and increase disturbance during the critical nesting season.

Paddling

The Clarks Fork of the Yellowstone River is one of North America's premier whitewater destinations. The Box (Middle Canyon) is documented as one of the most challenging and dangerous multi-day Class V+ kayaking trips in North America, featuring a 1,200-foot deep gorge with numerous mandatory portages. The Honeymooner Stretch is a classic Class IV–V pool-drop day run just upstream of The Box. The Day Stretch is a Class IV section with two Class V features ("Adrenaline" and "The Point").

Lower Sunlight Creek is a 6-mile Class III+ to Class V- run through a forested canyon with boulder gardens. Crandall Creek is an intermediate Class III to IV+ creek-boating run with tight, powerful rapids and 60-foot cliff walls. Beartooth Creek is a steep descent from Beartooth Lake to the Clarks Fork.

Put-ins for The Box are at the Crandall Creek Bridge or a hike-in location halfway through the flat water between major portages; take-out is at the terminus of Clarks Fork Canyon Road. Sunlight Creek put-in is at the bridge upstream of Highway 296; take-out is at the Highway 296 bridge. Crandall Creek put-in is at the Highway 296 bridge; take-out is at the Clarks Fork confluence. Beartooth Lake has a boat launch for flatwater paddling.

The primary season begins after the Beartooth Highway opens (typically Memorial Day weekend). Target flows for the Clarks Fork are approximately 200 cfs. The 2022 flooding significantly altered the riverbed, creating new hazards. The roadless condition preserves the wild character of the Clarks Fork canyon and maintains the remote, technical nature of these runs—road construction would increase access pressure and alter the expedition character that defines paddling here.

Photography

Scenic overlooks and viewpoints include Beartooth Pass (10,947 ft), offering 360-degree views of the alpine tundra; East Summit (11,029 ft) with vistas of the Beartooth and Absaroka ranges; the Clarks Fork Overlook with sweeping views of the deep canyon; and the Pilot and Index Peaks Overlook, featuring Matterhorn-like spires. Clay Butte Fire Lookout (accessible via a 3-mile gravel road) offers panoramic views of Beartooth Butte and wildfire recovery areas. Gardner Lake Pullout provides views of the Gardner Lake Headwall, often retaining snow into late summer. Rock Creek Vista Point (9,190 ft) is a wheelchair-accessible overlook near the Montana-Wyoming line.

Waterfalls include Beartooth Falls, visible from the highway where the Beartooth Lake outlet rushes through a ravine; Lake Creek Falls, with a short 200-yard hike to a pedestrian bridge; and Crazy Creek Falls, a powerful cascade best viewed in late spring and early summer. Glacial lakes—Beartooth Lake (with Beartooth Butte backdrop), Island Lake, Little Bear Lake, Long Lake, and Twin Lakes—provide alpine water photography.

Wildflower displays peak from late June through August. Alpine meadows feature sky pilot, alpine forget-me-not, moss campion, and arctic gentian. Tundra features include patterned ground and flag trees shaped by extreme winds. Brilliant yellow aspen displays occur at lower elevations (around 8,000 ft) in late summer.

Wildlife photography opportunities include grizzly and black bears, mountain goats (often near Gardner Lake), bighorn sheep, moose, elk, and yellow-bellied marmots. High-altitude birds such as Clark's Nutcrackers, Golden Eagles, and Mountain Bluebirds are frequently photographed. The high alpine tundra provides unobstructed stargazing, with the Milky Way visible from late February to early October and occasional Northern Lights during periods of high solar activity. The roadless condition preserves the dark sky conditions and wildlife habitat that make this landscape exceptional for photography—road construction would introduce light pollution and fragment wildlife corridors.