TrailAvalanche Peak Trailhead 5N2
4.5-mile out-and-back; 2,100 ft gain. Relentless climb with a true summit payoff.

The Sheepeater Ski Trail is a low-angle, 5-mile winter route ideal for introducing new skiers to backcountry travel. Gently rolling terrain (60 feet elevation) cuts through mixed forest and meadow with consistent views of Swan Lake Flats and the Gallatin Range. This is attainable skiing, not a lung-buster, but winter exposure is real—wind, cold, and possible whiteout demand proper layers and hydration discipline. Shuttle access from Mammoth Hot Springs means you don't exhaust yourself just getting there.
Easy
Sustained views of Swan Lake Flats and the Gallatin Range. Active wildlife spotting (bison, elk) if you stay alert and respect distance. Forested sections alternate with open meadow.
["Book shuttle well in advance (at least 1 day ahead, ideally 3+ days for weekends).", "Arrive at the lot by 7 AM. Parking fills, and shuttle availability isn't guaranteed.", "Check shuttle schedule and snow conditions by phone before driving (307-344-7311).", "Layer aggressively and shed one layer immediately if you start sweating. Wet clothing kills you.", "Make constant noise (talk, whistle, bells). Bison and elk don't retreat; they don't know you're coming.", "Carry 2L water minimum. Winter dehydration is silent and deadly."]
Winter (December-March)
["Hydration kills you in winter—you won't feel thirsty, but dehydration is fatal. Carry 2L minimum.", "Make constant noise. Bison and elk don't retreat; they don't know you're coming. Carry a whistle.", "Wear layers and shed immediately if you sweat. Cotton is death; use synthetics or merino.", "Stay 100+ yards from bears/wolves, 25+ yards from bison and other wildlife. Federal law.", "Check shuttle availability before you drive. Call ahead; don't show up and hope.", "Bring map and compass. Trail markers hide under fresh snow; navigation skills are essential.", "Trekking poles help in deep snow and provide stability on ice."]
Easy terrain suitable for families. Shuttle reduces physical demand. Proper winter gear essential—cold exposure is real. Children must understand wildlife distance rules (25+ yards from bison/elk, 100+ yards from bears/wolves). Supervise closely in wildlife areas.
Skiers praise this easy, scenic winter route for its gentle terrain and Swan Lake views. The shuttle access appeals to those wanting winter skiing without the grind of a long climb. Bison spotting is common and rewarding if you respect distance and stay alert.
No permits required.
Shuttle reservations recommended. Shuttle stop from Mammoth Hot Springs Hotel. Shuttle also available from Indian Creek Warming Hut to Sheepeater Cliffs. Book in advance: Call 307-344-7311, toll-free 866-439-7375, TDD 304-344-5395, or reserve at Mammoth Hot Springs Hotel. Shuttle often fills on weekends and holidays.
Bison and elk frequent this trail—federal law requires 25+ yards minimum distance. Bears and wolves demand 100+ yards. Ground is unstable in hydrothermal areas; stay on marked trail and boardwalks. Winter conditions (0–20°F typical, wind chills much lower) create exposure risk. Dehydration is lethal in winter because thirst isn't obvious.
Gently rolling terrain with minimal elevation gain (60 feet). Well-marked, skier-tracked trail. No steep sections. Accessible to intermediate skiers and snowshoers. Winter snow depth and ice conditions may limit access for those with mobility issues.
Easy terrain suitable for families. Shuttle reduces physical demand. Proper winter gear essential—cold exposure is real. Children must understand wildlife distance rules (25+ yards from bison/elk, 100+ yards from bears/wolves). Supervise closely in wildlife areas.
Skiers praise this easy, scenic winter route for its gentle terrain and Swan Lake views. The shuttle access appeals to those wanting winter skiing without the grind of a long climb. Bison spotting is common and rewarding if you respect distance and stay alert.
" Skiers praise this easy, scenic winter route for its gentle terrain and Swan Lake views. The shuttle access appeals to those wanting winter skiing without the grind of a long climb. Bison spotting is common and rewarding if you respect distance and stay alert."
Yes, but with caveats. Terrain is easy (60 feet elevation over 5 miles), but winter conditions are unforgiving. You need basic ski or snowshoe skills and proper gear. If you've never done winter trail skiing, this is still achievable—shuttle access doesn't penalize you for a slower pace.
Mostly yes if you follow protocol. Bison and elk frequent this area—stay 25+ yards away, make constant noise. Federal law requires 100+ yards from bears/wolves. No cell service; carry emergency whistle, map, and compass. If you're nervous about solo wildlife, bring a partner.
Winter ski or snowshoe setup, insulated boots, minimum 2+ insulating layers, wind-resistant parka, hat, goggles, sunscreen, 2L water, hand/toe warmers, emergency whistle, map, compass. Trekking poles help. Winter gear is not optional.
2–3 hours per NPS estimate. Depends on snow condition, pace, and time spent wildlife spotting. Fresh snow = faster skiing. The shuttle saves your legs on the return.
Yes, especially December and weekends. Call 307-344-7311, toll-free 866-439-7375, or book at Mammoth Hot Springs Hotel. Shuttle often fills; don't show up hoping for a spot.
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