Garfield Mountain

The Garfield Mountain Inventoried Roadless Area covers 41,891 acres along the Continental Divide in the Beaverhead Mountains of the Beaverhead-Deerlodge National Forest, Montana. The terrain is mountainous and montane, anchored by Garfield Mountain, Knob Mountain, The Thumb, and the Lima Peaks complex, with the historic crossing at Bannack Pass and the steep break of Four Eyes Canyon. The area drains principally through the Upper Little Sheep Creek watershed and a network of tributaries: Little Beaver Creek, Pine Creek, Middle Creek, Shineberger Creek, West Fork Big Beaver Creek, Buffalo Creek, Warm Springs Creek, Beartrap Creek, Sawmill Creek, and Deep Creek. A suite of named springs — Dutch Hollow, Round Timber, Continental, Buffalo, and Sawmill — feeds the headwaters from the limestone benches.

Forest communities reflect the dry-cold climate of the upper Continental Divide. Lower benches and broad valleys carry Intermountain Mountain Sagebrush Steppe, Columbia Plateau Low Sagebrush Steppe, and Great Basin Big Sagebrush Shrubland, with big sagebrush (Artemisia tridentata), antelope bitterbrush (Purshia tridentata), hoary sagebrush (Artemisia cana), and Hood's phlox (Phlox hoodii) covering the open ground. Steep limestone slopes support Intermountain Mountain Mahogany Woodland of curl-leaf mountain-mahogany (Cercocarpus ledifolius), a regionally distinctive evergreen. Above these, Central Rockies Douglas-fir Forest of Douglas-fir (Pseudotsuga menziesii) climbs into Rocky Mountain Lodgepole Pine Forest and Rocky Mountain Dry and Wet Subalpine Spruce-Fir Forest. The highest open ridges hold Rocky Mountain Limber and Bristlecone Pine Woodland. Quaking aspen breaks the conifer cover at seep edges, and Rocky Mountain Subalpine Streamside Woodland threads the creek bottoms. Above treeline, cushion plant communities hold moss campion (Silene acaulis), mountain douglasia (Androsace montana), and skunk polemonium (Polemonium viscosum).

Wildlife works the gradient between dry sagebrush bench and high alpine ridge. Wapiti (Cervus canadensis), pronghorn (Antilocapra americana), and moose (Alces alces) winter on the lower benches and rise into the subalpine basins in summer, drawing gray wolf (Canis lupus) and brown bear (Ursus arctos) into the high country. American pika (Ochotona princeps) holds the talus on Garfield Mountain and the Lima Peaks, and American badger (Taxidea taxus) and Wyoming ground squirrel (Urocitellus elegans) work the steppe margins. Golden eagle (Aquila chrysaetos) rides the thermals along the divide, and black rosy-finch (Leucosticte atrata) uses the snowfields and rock benches in summer. Great gray owl (Strix nebulosa) hunts the older spruce-fir; mountain bluebird (Sialia currucoides) takes the open meadows. Rainbow trout (Oncorhynchus mykiss) hold the cold runs of Little Sheep Creek and its tributaries. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A traveler entering from the Lima-Monida country climbs through sagebrush steppe onto the broken limestone benches that rise toward Lima Peaks. The route to Bannack Pass crosses the long open faces where curl-leaf mountain-mahogany grows in the rock crevices, and the ridge above opens onto the Continental Divide. From the summit of Garfield Mountain the view runs west along the Beaverhead crest and east into the Centennial Valley. Above timberline the wind takes the conversation, and the white-crowned sparrow's call carries from one cushion-plant bench to the next. Below, the named springs — Continental, Buffalo, Sawmill — feed Four Eyes Canyon and the Little Sheep Creek drainages.

The Centennial Mountains rise along the Continental Divide on Montana's southern border with Idaho, and within them sits the 41,891-acre Garfield Mountain Inventoried Roadless Area. The valley north of the divide bears the footprints of the Blackfoot, Crow, Flathead, Bannock, Nez Perce, and Shoshone peoples, who frequented it as hunting and fishing ground when the snow melted and before the fall snows arrived [4]. The Bannock had long maintained trails from the headwaters of the Big Hole River eastward to Red Rock Lakes, past Henry Lake to Targhee Pass and the Yellowstone locality [4]. In August 1805, the Lewis and Clark Expedition met the Lemhi Shoshone near the Continental Divide; Shoshone people, who recognized Sacagawea as a long-lost family member, guided the party across the divide at nearby Lemhi Pass [1]. A small Shoshone party led by Pikee Queenah, known to the travelers as Old Toby, showed Lewis and Clark the route over the mountains [1]. Beaverhead Rock, a limestone landmark visible from the area's northern foreground, had been a well-known feature to area Native Americans long before the expedition arrived [2]. In 1877, after the Battle of the Big Hole, Chief Joseph and the Nez Perce used nearby Bannock Pass to escape back into Idaho [3].

Settlement followed the Lewis and Clark route by three generations. Cattlemen first ventured into the Centennial Valley in 1876, establishing some of the oldest ranches in Montana; the valley itself was named that year by rancher Rachel Orr in honor of the nation's centennial independence celebration [4]. The Utah & Northern Railroad, the first to reach Montana, laid tracks across the Continental Divide at Monida Pass in 1880, just east of Garfield Mountain [4]. Monida became a major shipping point, moving as many as 100,000 sheep and 48,000 head of cattle from summer ranges in the surrounding mountains [4]. From 1898 to 1913, Monida-Yellowstone Stagecoaches carried tourists from the railhead through the Centennial Valley to Yellowstone National Park [4]. Bannock Pass was developed by railroad engineers in the early twentieth century to link Dillon and Idaho [3].

Federal forest protection arrived in 1908. On July 1, 1908, President Theodore Roosevelt established the Beaverhead National Forest in Montana by executive order, alongside the neighboring Deerlodge National Forest — the latter created in part to halt clear-cutting in the upper Big Hole River watershed by the Anaconda Copper Mining Company [5]. The two forests were merged administratively in 1996 as the Beaverhead-Deerlodge National Forest [5]. In 1932 the federal government established the Red Rock Lakes Migratory Waterfowl Refuge (now Red Rock Lakes National Wildlife Refuge) in the Centennial Valley to protect what were then believed to be the last 66 trumpeter swans of their breed [4]. The 41,891-acre Garfield Mountain Inventoried Roadless Area sits within the forest's Dillon Ranger District in Beaverhead County and is protected under the 2001 Roadless Area Conservation Rule.

Vital Resources Protected

• Sagebrush Steppe Integrity: Over half of the Garfield Mountain area (53.4%) is Intermountain Mountain Sagebrush Steppe, with additional cover from Columbia Plateau Low Sagebrush Steppe, Great Basin Big Sagebrush Shrubland, and Intermountain Mountain Mahogany Woodland. The roadless condition preserves the unbroken big sagebrush, antelope bitterbrush, and curl-leaf mountain-mahogany communities that the sage-grouse complex and pronghorn, mule deer, and Wyoming ground squirrel depend on. Conversion of sagebrush ecosystems to non-native annual grasses such as cheatgrass is the principal regional driver of habitat loss; the absence of roads slows that conversion at the landscape scale.

• Continental Divide Wildlife Connectivity: Garfield Mountain sits on the Continental Divide between Lima Peaks and Bannack Pass, forming a key piece of the carnivore corridor between the Greater Yellowstone ecosystem and the Bitterroot-Selway wild lands. Canada lynx (federally Threatened), North American wolverine (federally Threatened), and grizzly bear (federally Threatened) all depend on landscape-scale, low-disturbance habitat for denning, dispersal, and seasonal movement. The unbroken cover supports gray wolf, brown bear, and big-game movement across this divide.

• Cold Headwater Stream Integrity and High-Elevation Refugia: The Upper Little Sheep Creek watershed and its tributaries — Little Beaver, Pine, Middle, Shineberger, Buffalo, Warm Springs, Sawmill, and Deep creeks — are fed by a suite of named springs (Continental, Buffalo, Sawmill, Dutch Hollow, Round Timber) emerging from the limestone benches. The roadless condition keeps these spring sources unaltered and the cold-water habitat used by rainbow trout free of road-cut sediment. The Rocky Mountain Limber and Bristlecone Pine Woodland on Garfield Mountain holds whitebark pine (federally Threatened) and limber pine subject to white pine blister rust, and the roadless state limits the disturbance corridors through which the non-native pathogen spreads.

Potential Effects of Road Construction

• Sagebrush Conversion to Invasive Annual Grasses: Road construction on the area's broad sagebrush-steppe slopes would create disturbed, sun-exposed roadside corridors that are documented colonization pathways for cheatgrass, spotted knapweed, and other invasive annuals. Sagebrush systems converted to non-native annual grasses lose habitat for sage-grouse, pronghorn, Wyoming ground squirrel, and the suite of sagebrush-obligate songbirds; once conversion takes hold, native sagebrush communities take decades or longer to reestablish. With sagebrush steppe at 53.4% of the area, this conversion would change the dominant habitat type across the largest portion of the roadless block.

• Fragmentation of the Continental Divide Carnivore Corridor: A road network through Central Rockies Douglas-fir Forest, Rocky Mountain Lodgepole Pine Forest, and Rocky Mountain Subalpine Spruce-Fir Forest creates linear edges that interrupt the closed-canopy interior conditions Canada lynx need for denning and that wolverine and grizzly bear use for dispersal across the divide. Roads also increase incidental carnivore mortality through vehicle encounters and expanded human access into previously remote habitat. Breaking the Continental Divide corridor here would weaken the connection between the Greater Yellowstone ecosystem and the Bitterroot-Selway wild lands.

• Sedimentation of Spring-Fed Streams and Whitebark Pine Spread Vectors: Road construction on the limestone slopes above Upper Little Sheep Creek would deliver fine sediment from cut banks and ditch erosion directly into the spring-fed cold-water tributaries that support rainbow trout. Building roads into the subalpine and whitebark pine zones would create linear disturbance pathways through which non-native white pine blister rust and mountain pine beetle spread more rapidly, undermining the high-elevation refugia these long-lived conifers depend on.

Hiking and Backcountry Trails

The Garfield Mountain Inventoried Roadless Area covers 41,891 acres along the Continental Divide in the Beaverhead Mountains of the Beaverhead-Deerlodge National Forest. The Continental Divide National Scenic Trail (#1004D, 17.0 miles of native-surface tread) runs the length of the area along the Montana-Idaho border, traversing Bannack Pass, the Lima Peaks, and the summit ridges around Garfield Mountain. Drainage routes include the Little Sheep Creek Trail (#1040, 12.2 miles), the area's longest stream-bottom route, and the shorter Edie Creek-Dry Creek (#1193, 3.5 miles), Sawmill-Deep Creek (#1503, 2.7 miles), Sawmill (#1511, 2.5 miles), and Shineberger (#1113, 0.9 miles) trails. The Continental Divide Trail through this segment is designated as a horse stock route; most of the drainage routes are open to hikers, horse parties, and bikes. Cross-country travelers can follow the broad ridge between Knob Mountain, The Thumb, and Garfield Mountain along the divide, with the headwaters of Big Beaver Creek and Little Sheep Creek dropping into the surrounding watersheds on either side.

Trailheads and Camping

There are no marked trailheads on this side of the divide; access is from forest road spurs out of the Lima and Monida country. East Creek Campground provides developed camping at the area's edge, and dispersed camping is permitted along the perimeter forest roads. Bannack Pass — a long-used route between Montana and Idaho — provides historic vehicle access to the divide at the western end of the area.

Fishing

Fishing centers on the cold-water tributaries draining the area. Rainbow Trout (Oncorhynchus mykiss) hold gravel runs in Upper Little Sheep Creek, the East and West Forks of Little Sheep Creek, Middle Creek, Shineberger Creek, Buffalo Creek, Warm Springs Creek, Sawmill Creek, and Deep Creek. The cold, spring-fed character of these waters depends on the absence of road-cut sediment delivery; named springs — Continental Spring, Buffalo Spring, Sawmill Spring, Dutch Hollow Spring, and Round Timber Spring — feed the headwaters from the limestone benches. The fishery here is a foot or stock-access experience.

Hunting and Wildlife Watching

The roadless block supports hunting for wapiti (Cervus canadensis), pronghorn (Antilocapra americana), moose (Alces alces), and white-tailed jackrabbit (Lepus townsendii). The mix of Intermountain Mountain Sagebrush Steppe — covering more than half the area — Central Rockies Douglas-fir Forest, and Rocky Mountain Limber and Bristlecone Pine Woodland holds big game year-round, with pronghorn working the open sagebrush benches and wapiti rising into the divide basins in summer. Wildlife watchers may observe American pika (Ochotona princeps) in the talus of Lima Peaks and Garfield Mountain, golden eagle (Aquila chrysaetos) and turkey vulture (Cathartes aura) riding the divide thermals, great gray owl (Strix nebulosa) in the older spruce-fir, and mountain bluebird (Sialia currucoides) on the open meadows. Wyoming ground squirrel (Urocitellus elegans) and American badger (Taxidea taxus) work the sagebrush margin; gray wolf (Canis lupus) and brown bear (Ursus arctos) move through the Continental Divide corridor.

Backcountry Skiing and Winter Travel

In winter, the broad, open ridges of the Continental Divide provide non-motorized backcountry ski and snowshoe terrain. Access from the Lima-Monida side depends on snowpack and road conditions; the Continental Divide Trail corridor remains the primary winter route through the area.

What the Roadless Condition Supports

Recreation here depends on the absence of new roads. The cold spring-fed headwaters that hold rainbow trout stay sediment-free without road-cut drainage inputs. The unbroken sagebrush bench provides the kind of open, low-disturbance habitat that hunters return to for pronghorn and wapiti. The Continental Divide Trail remains a non-motorized native-surface long-distance route between Lima Peaks and the western ridges of the Beaverhead Range. A road network would change those conditions and the recreation that depends on them.