Bozeman: Potosi Peak Loop

A stout, 15.4-mile off-trail loop to a handful of peaks in the Tobacco Roots finishes off at steamy hot springs perfect for relaxing sore muscles.
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A stout, 15.4-mile off-trail loop to a handful of peaks in the Tobacco Roots finishes off at steamy hot springs perfect for relaxing sore muscles.

Trail Facts

  • Distance: 23.4

Waypoints

PPK014

Location: 45.5841293334961, -111.899398803711

Drop gear @ car; decompress @ Potosi Hot Springs 1 mi. N on Trail #308. Find springs (104?110°F) L of trail

PPK008

Location: 45.5880813598633, -111.980201721191

Potosi Peak (10,128 ft.): Peer out to a sea of Big Sky ranges towering over fl atlands; follow easy contour lines W

PPK011

Location: 45.5899085998535, -112.009399414062

Hop onto newly graded mine road

PPK012

Location: 45.5843391418457, -112.00659942627

Old miner?s cabin; nice place to rest and refuel

PPK007

Location: 45.5846214294434, -111.967903137207

Last unnamed peak is above treeline; head straight for Potosi Peak

PPK001

Location: 45.5765800476074, -111.90779876709

Trailhead #303: Zigzag up stiff switchbacks on the Potosi Trail

PPK002

Location: 45.5798797607422, -111.917602539062

Trail nears giant plateau on fi nal switchback; bear W off trail, head toward shallower ridge that curls up the mountain; stay above dry creekbed

PPK005

Location: 45.5734100341797, -111.950698852539

Climb over 1st of 3 nameless peaks. Wispy prairie to N; to E, see snow in shady couloirs of Tobacco Root range

PPK003

Location: 45.5739212036133, -111.931396484375

Follow well-worn game trail made by elk, deer, and black bears

PPK004

Location: 45.5723609924316, -111.947799682617

Hit main spine, then head W

PPK006

Location: 45.577709197998, -111.958801269531

Rest out of the wind in this convenient col

PPK009

Location: 45.5881309509277, -111.990699768066

Saddle between Potosi Peak and Horse Mtn.; bear R

PPK010

Location: 45.5922088623047, -112.005302429199

Horse Mtn.: Lakes shimmer below. Turn S, follow game trail to saddle

PPK013

Location: 45.5816383361816, -112.001403808594

Continue on road 5.9 mi. past gold/silver prospects to trailhead