Pacific Creek - Blackrock Creek

The Pacific Creek - Blackrock Creek Inventoried Roadless Area covers 24,658 acres on the Bridger-Teton National Forest in northwestern Wyoming, in the upper Buffalo Fork country at the head of Jackson Hole. The terrain takes in Davis Hill, Breccia Cliffs and Breccia Peak, Angle Mountain, Blackrock Meadows, and Road Camp Draw — a mix of volcanic-breccia outcrops, subalpine basins, and broad alpine ridges. The area generates water for the Upper Buffalo Fork watershed, with Pacific Creek and Clear Creek as principal drainages, and Lost Lake and Tracy Lake holding water in the basins. These cold-water streams descend through subalpine forest and meadow toward the Snake River system.

Forest communities sort along the elevation and moisture gradients. Rocky Mountain Dry Subalpine Spruce-Fir Forest and Rocky Mountain Wet Subalpine Spruce-Fir Forest dominate the cooler upper slopes, where Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa) form closed-canopy stands. Northern Rockies Subalpine Woodland and Parkland holds the transition between forest and meadow. Rocky Mountain Lodgepole Pine Forest (Pinus contorta) covers extensive mid-elevation slopes, with Central Rockies Douglas-fir Forest (Pseudotsuga menziesii) on warmer exposures. Rocky Mountain Aspen Forest patches the slopes with quaking aspen (Populus tremuloides). Above the conifer band, Rocky Mountain Alpine Meadow, Rocky Mountain Alpine Dwarf-Shrubland, and Rocky Mountain Alpine Rocky Terrain extend across Breccia Peak and Angle Mountain. Northern Rockies Subalpine Grassland and Rocky Mountain Subalpine Meadow open between conifer stands in Blackrock Meadows and similar parks. Limber pine (Pinus flexilis) holds the dry rims, and Intermountain Mountain Sagebrush Steppe with big sagebrush (Artemisia tridentata) and antelope bitterbrush (Purshia tridentata) covers the lower transitions. Rocky Mountain Subalpine Streamside Woodland and Subalpine Streamside Shrubland line Pacific and Clear Creeks.

Wildlife sorts along these gradients. The area lies within the Greater Yellowstone Ecosystem and supports the full suite of large mammals. Wapiti (Cervus canadensis), moose (Alces alces), mule deer (Odocoileus hemionus), white-tailed deer (Odocoileus virginianus), pronghorn (Antilocapra americana), bighorn sheep (Ovis canadensis), and Rocky Mountain goat (Oreamnos americanus) use the elevational mosaic. American black bear (Ursus americanus), cougar (Puma concolor), gray wolf (Canis lupus), coyote (Canis latrans), and red fox (Vulpes vulpes) work the forest and meadow edges. Pacific marten (Martes caurina, IUCN apparently secure) and American badger (Taxidea taxus) move through the high country. Trumpeter swan (Cygnus buccinator, IUCN apparently secure) uses the lake habitats, and great gray owl (Strix nebulosa), boreal owl (Aegolius funereus), and northern pygmy-owl (Glaucidium gnoma) hunt the conifer forest. Three-toed and black-backed woodpecker (Picoides dorsalis, Picoides arcticus) work post-fire and beetle-killed stands. Rocky Mountain cutthroat trout (Oncorhynchus virginalis), mountain whitefish (Prosopium williamsoni), and Bonneville sculpin (Cottus semiscaber) hold the cold-water reaches. American dipper (Cinclus mexicanus) hunts the riffle waters. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A walker entering the area from the Buffalo Fork drainage climbs through sagebrush flats into Douglas-fir and lodgepole forest, then through spruce-fir to the alpine ridges of Breccia Peak. The volcanic breccia cliffs catch late light, and the meadows of Blackrock Meadows open between stands of subalpine fir where elk graze through summer.

The Pacific Creek - Blackrock Creek Inventoried Roadless Area lies in the upper Buffalo Fork country of northwestern Wyoming, on the eastern flank of the Teton Range and just south of Yellowstone National Park. Indigenous use of this country reaches back deep into prehistory. "Archeological evidence shows that Native Americans first appeared in Jackson Hole approximately 10,000 years ago" [1]. "The earliest archeological evidence of people in and around the Town of Jackson dates back about 11,000 years" [2]. By the time Europeans arrived, "tribes such as the Shoshone, Bannock, Blackfoot, Crow, Flathead, Gros Ventre, Nez Perce and others were harvesting the valley's seasonal riches" [3]. The Mountain Shoshone, also known as Sheepeaters, lived in the high country year-round, while most other bands "visited the area in summertime only" because of "the ruggedness of the country and its inhospitable winters" [1]. Indigenous camps and trails remain visible "on the valley floor and high in the Tetons" [2].

European-era arrival followed the fur trade. "Familiar names in the area including Davey Jackson, John Colter, Jedediah Smith and William Sublette came to this valley in the early 1800s" [2]. Wilson Price Hunt, traveling for fur entrepreneur John Jacob Astor's Pacific Fur Company, led a party "up Wyoming's Wind River and back down the Hoback River to its confluence with the Snake" in 1811 [2]. The valley took its name from David Jackson, a fur trapper of the same era [1]. Because of the rough terrain and severe weather, settlement was slow: "homesteading did not begin until the 1880s" [1]. The first two homesteads in the area were filed in 1884, and by 1900 the resident population had grown to 640 homesteaders [2].

Federal protection arrived in the conservation surge of the 1890s and early 1900s. "In 1897, President Grover Cleveland took the first step toward conservation of the Tetons with the establishment of Teton Forest Reserve on 829,440 acres south of present-day Yellowstone National Park" [1]. "In 1908, President Theodore Roosevelt expanded the reserve into the 1,991,200-acre Teton National Forest, covering all of the Teton Range and including half of the land that would later become Grand Teton National Park" [1]. The Town of Jackson was named in 1894 and incorporated as a municipality in 1914 [2].

Tourism shaped land use after that. Dude ranches grew up in Jackson Hole in the early 20th century, and "between 1919 and 1923, private irrigation companies proposed a series of dams on lakes within the national forest while lodges and summer cabins sprouted on private and public land throughout the valley" [1]. In 1929, President Calvin Coolidge signed the act creating Grand Teton National Park, initially at half its present size. John D. Rockefeller, Jr., began buying land in northern Jackson Hole in 1927 through the Snake River Land Company, eventually donating it for park expansion [1]. In 1950, Congress added the Jackson Hole National Monument to Grand Teton National Park, completing the park as it now stands [1]. The 24,658-acre Pacific Creek - Blackrock Creek Inventoried Roadless Area sits within the Blackrock Ranger District of the Bridger-Teton National Forest (a unit that combined Teton and Bridger forests), in Fremont and Teton Counties, and is protected under the 2001 Roadless Area Conservation Rule.

Vital Resources Protected

• Greater Yellowstone Ecosystem Connectivity: The 24,658-acre roadless area lies within the Greater Yellowstone Ecosystem and provides large, unfragmented habitat supporting grizzly bear (Threatened), Canada lynx (Threatened, with designated critical habitat), and North American wolverine (Threatened). These species require very large home ranges across continuous habitat with minimal human infrastructure. The Buffalo Fork country links the southern Yellowstone backcountry to the Teton Wilderness and the broader Bridger-Teton, providing connectivity essential to gene flow and seasonal movement of wide-ranging carnivores.

• Cold Headwater Stream Integrity: Pacific Creek and Clear Creek descend through Rocky Mountain Subalpine Streamside Woodland and Subalpine Streamside Shrubland, feeding the Upper Buffalo Fork and ultimately the Snake River. Without road density, sediment delivery stays low and stream temperatures remain cold under intact riparian shade. Rocky Mountain cutthroat trout, mountain whitefish, and Bonneville sculpin hold the cold-water reaches, and American dipper hunts invertebrates dependent on clear water. The lake habitats of Lost Lake and Tracy Lake retain their natural shoreline character.

• Whitebark Pine and Subalpine Habitat: Northern Rockies Subalpine Woodland and Parkland supports whitebark pine (Pinus albicaulis, Threatened; IUCN endangered) at the elevations where it is most viable. Whitebark pine is a keystone subalpine species — its seeds feed Clark's nutcracker, red squirrel, and pre-hibernation grizzly bear. The unroaded condition limits human-caused disturbance during the critical late-summer cone period and preserves the genetic exchange between intact stands that whitebark recovery depends on, even as the species faces independent pressure from white pine blister rust and mountain pine beetle.

Potential Effects of Road Construction

• Carnivore Habitat Fragmentation: Road construction in lynx critical habitat would create the kind of disturbance pattern that the listing specifically identifies as a threat. Grizzly bear and wolverine respond strongly to road density; documented research links higher road densities to lower carnivore survival through increased human conflict, vehicle collisions, and access for poaching. Cutting roads through the continuous subalpine forest matrix would create barriers that fragment seasonal movement between Yellowstone, the Teton Wilderness, and the broader Bridger-Teton. The behavioral displacement effect extends far beyond the road prism, and lost connectivity is extremely difficult to restore.

• Sedimentation in Cold-Water Streams: Road construction on the steep volcanic-breccia slopes of the Breccia Cliffs and Angle Mountain country would deliver chronic sediment into Pacific Creek and Clear Creek. Cut-and-fill grading on volcanic substrates is particularly prone to erosion, and the documented streambed character that Rocky Mountain cutthroat trout require for spawning would degrade as fine sediment embeds the cobble substrate. Recovery of cold-water stream substrate after a road network is established is exceptionally slow.

• Whitebark Pine and Alpine Community Loss: Road construction at subalpine and alpine elevations would directly remove the slow-growing whitebark pine stands and the fragile alpine meadow and dwarf-shrubland communities of Breccia Peak, Angle Mountain, and surrounding ridges. These communities exist on thin soils with short growing seasons, and recovery is measured in centuries. The road corridor itself provides a colonization pathway for invasive species (cheatgrass, Dalmatian toadflax, musk thistle) already documented at lower elevations, accelerating their movement into the high country.

The 24,658-acre Pacific Creek - Blackrock Creek Inventoried Roadless Area on the Bridger-Teton National Forest sits at the head of Jackson Hole, on the Blackrock Ranger District. The area includes Davis Hill, the volcanic-breccia Breccia Cliffs and Breccia Peak, Angle Mountain, Blackrock Meadows, and Road Camp Draw, with Pacific Creek and Clear Creek draining toward the Upper Buffalo Fork. Recreation is heavy compared to many roadless areas because the unit lies between Grand Teton National Park, the Teton Wilderness, and the popular Buffalo Valley corridor.

Trail-based recreation is extensive. The Pacific Creek Trail (#6036) is the longest backcountry route at 15.2 miles, providing access into the Teton Wilderness and the upper Pacific Creek drainage. The Box Creek Trail (#6038) covers 12.9 miles, the Lava Creek Trail (#6039) covers 10.3 miles, and the North Buffalo Fork Trail (#6047) covers 6.0 miles. Shorter routes include the South Fork Buffalo Trail (#6053) at 5.9 miles, the Sublette Pass Trail (#823.1E) at 5.8 miles, the Clear Creek Trail (#6050) at 5.7 miles, the Holmes Cave Trail (#6057) at 4.7 miles, and the Angles Trail (#6067) at 2.7 miles. All summer trails are designated for hiker and horse use, and several enter the Teton Wilderness from this jumping-off country.

Winter recreation is significant. Six dedicated snow trails support snowmobile and cross-country ski use: the Two Ocean Snowmobile Trail (#6SM30010) at 5.6 miles, the Flagstaff Creek Snowmobile Trail (#6SM30100) at 8.6 miles, the Old Togwotee Highway/4 Mi Road Trail (#6SM30040) at 8.0 miles, the Flagstaff Connector (#6SM30100A) at 2.4 miles, and three Turpin Meadows cross-country ski loops (Back 40, Summer Home, and Riverside) totaling 5.8 miles. Three established trailheads provide winter access.

Six developed trailheads — Turpin Meadow, Box Creek, Angles, Pacific Creek (USFS), Togwotee Snowmobile, and a second Pacific Creek — anchor summer and winter access. Three campgrounds within or adjacent to the unit support overnight use: Turpin Meadow Campground, Box Creek Campground, and Pacific Creek Campground.

Hunting is a major draw. The country is within the Greater Yellowstone Ecosystem and supports a full suite of large mammals. Wapiti, mule deer, white-tailed deer, moose, pronghorn, bighorn sheep, and Rocky Mountain goat occur across the elevational mosaic. Black bear hunting is also significant, governed by Wyoming Game and Fish Department regulations and area-specific draws. Grizzly bear is present (Threatened); hunters must follow bear-aware practices including bear spray carry. Outfitter-assisted hunts are common, and hunters should consult the Blackrock Ranger District for closures.

Fishing is excellent. Rocky Mountain cutthroat trout (Oncorhynchus virginalis), mountain whitefish (Prosopium williamsoni), brown trout (Salmo trutta), and Bonneville sculpin (Cottus semiscaber) hold the cold-water reaches of Pacific Creek and Clear Creek. Lost Lake and Tracy Lake provide standing-water fishing. Wyoming Game and Fish regulations apply throughout.

Birding ranks among the best in the lower 48. Thirteen eBird hotspots lie within 24 km of the area; Grand Teton NP--Oxbow Bend reports 176 species. Inside the unit, broad-tailed and calliope hummingbird feed at meadow wildflowers, great gray owl and boreal owl hunt the conifer canopy, three-toed and black-backed woodpecker work post-fire stands, and Clark's nutcracker caches whitebark pine seeds across the upper ridges. Trumpeter swan uses the lake habitats. Cassin's finch, western tanager, and Townsend's warbler thread the conifer canopy.

Photography subjects include the volcanic-breccia cliffs of Breccia Peak, the meadow expanses of Blackrock Meadows, the Buffalo Fork corridor, Greater Yellowstone wildlife including bear and wolf, and high-elevation wildflower communities.

The recreation here depends on the roadless condition. Roads constructed for any purpose would fragment Canada lynx critical habitat, disrupt grizzly bear seasonal movement, deliver chronic sediment into Pacific Creek and Clear Creek, and convert the backcountry character into a front-country motorized landscape. The current 16 mapped trails, six trailheads, and three campgrounds support the quiet backcountry use the area's unroaded condition makes possible.