Glacier Peak

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Montana, United States, North America
Hiking, Mountaineering, Scrambling, Skiing
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12340 ft / 3761 m
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Glacier Peak
Created On: Aug 31, 2012
Last Edited On: Aug 7, 2013


Glacier Peak in the Montana Beartooth Mountains is the westernmost 12,000 foot peak and dominates the western margin of the range. This peak has fantastic technical routes on its north face, including the Beckey Couloir which cuts right to the summit through the face for over 2000 feet. The south face is relatively gentle and allows for an easy ascent from the Aero Lakes. The traverse to Mount Villard can also offer some moderate climbing. Views in all directions are stunning and the Cathedral Spires will stare you right in the face to the southeast.

There are many peaks named Glacier Peak around the world it almost feels like it may be the most common peak name, up there with Grizzly Peak and Bald Mountain. Naturally, it is unknown why this peak was given the name "Glacier Peak" but it most likely has to do with some kind of glacier carving work. Since the north face is so dramatic it may be the reason. Imagine glaciers completely filling all the valleys you see in the Beartooths all the way to the elevation of the current summit plateaus of all the peaks. That's ice coverage exceeding 2000 feet think in many places! Today, the Hidden Glacier flanks the base of the north face and it's aptly named as it really is hard to see.

Glacier Peak area panorama

Glacier Peak, Mount Villard and Granite Peak from Beartooth Butte

Getting There

The standard way to approach Glacier Peak is from the south where an ascent of the Class 2 south slopes can be made. Use the Aero Lakes trailhead to access the area.

Lower Trailhead
From the tiny town of Cooke City, six miles from the northeast entrance to Yellowstone National Park, head east on US Highway 212 for 1.6 miles to the Lulu Pass Road. Turn left on this good dirt road and measure from this point. Go 1.1 miles to a 3 way fork and continue on the middle fork. Stay right at 1.8 miles and reach the signed Goose Lake junction after 2.4 miles. Do not continue straight towards Goose Lake as this quickly becomes a high clearance 4WD road but instead park off the road at this large intersection. If you have a 4WD vehicle or a tough passenger car with good clearance you can continue to the trailhead by taking a very sharp right turn on a small side road. Follow this rutted road for 0.3 miles to its end at 8,850 feet at an old mining cabin and a slough of mining ruins. You can camp here but the grizzly bears have been known to be a problem in this area.

Upper Trailhead
If you want to shorten your approach a little you can continue straight at the large Goose Lake intersection, passing by Mud and Round Lakes to a point 0.3 mile past Round Lake at an elevation of 9,420 feet. From here a switchbacking trail heads east downhill for 1 mile and meets the main Aero Lakes trail just to the north of Lady of the Lake at 9,150 feet.

Index/Pilot Peak on the...Aero Lakes


From the lower trailhead, begin by crossing the creek just to the right of the old cabin (which was loaded with books, a stove, cots and all the newspapers you can dream of). Follow the trail to the northeast for 1.5 miles to the south end of Lady of the Lake to a signed junction and turn left. Continue on the nice trail around the west side of the lake for another mile to a second junction where the trail that descends from the upper trailhead meets the main trail. Stay straight and continue 1.8 miles to a third junction. Cross Star Creek enroute and take a right heading up the trail to Aero Lakes. Reach Lower Aero Lake at 10,000 feet after another 1.1 miles, a total of 4.4 miles from the lower trailhead. Fantastic camping can be found here. You can also continue northeast around Lower Aero Lake to the upper lake with even better camping and view with more solitude.

Aptly named Rough Lake, with the Mt. Villard Spires behind, and point 11397Cathedral Spires
Upper Aero Lake CampsiteCamping at Aero Lakes
Left to Right - Glacier,...Glacier Peak from Aero Lakes

Route Options

South Slopes - Class 2
From Upper Aero Lake, head around the north shores of both lakes and continue north on talus or snow depending on the season aiming for the gentle south slopes and hike up directly to the summit, about 2,200 feet of elevation gain over the course of a couple miles. The views from the summit are breathtaking and don't forget to peer over the north face while up there!

Lower Aero LakeLower Aero Lake
two steps up and one step backGlacier Peak N face
Upper Aero LakeUpper Aero Lake

North Face "Beckey Couloir" - Class 5.7, Steep Snow/Ice
Not only is this route very difficult with very steep snow and ice nearing 60 degrees in steepness with up to 5 pitches of 5th class rock climbing, it is difficult to access. It was first climbed by Fred Beckey in the summer of 1965. Likely the best place to approach this face is from Goose Lake since the wilderness boundary takes a large jog to the north allowing for vehicular travel to get closer to the highest peaks. A nice trail heads northeast for 3 miles from the wilderness boundary just south of Goose Lake to the 10,650 foot saddle between Iceberg Peak and Sawtooth Mountain, where the infamous Grasshopper Glacier flanks the north side of this saddle. If you look closely you might see some grasshoppers in the ice. You can descend the Grasshopper Glacier and traverse around the upper end of the West Rosebud Creek drainage and round the west face of Glacier Peak at the 9,500-10,000 foot level and reach the base of the Beckey Couloir at 10,000 feet, 2 miles from the saddle.

You can also approach the north face by continuing straight on the trail along Zimmer Creek for 1.4 miles to Zimmer Lake at 10,150 feet instead of heading to Aero Lakes. You can then head north on gentle slopes to the 10,800 foot saddle between Iceberg Peak and Mount Wilse and descend the Grasshopper Glacier meeting up with the route described above in the upper West Rosebud Creek drainage.

Another approach option takes you to the West Rosebud Trailhead and has you hike the long trail to the west end of Mystic Lake and round around the north side of Island Lake. However large amounts of bushwhacking are required past this point as you must ascend along West Rosebud Creek all the way to treeline, 2,500 feet above Island Lake where the forest is pretty thick.

Goose LakeSawtooth Mountain
Grasshopper GlacierGrasshopper Glacier
West Rosebud CanyonWest Rosebud Creek

Glacier Peak area panorama

North faces of Glacier Peak and Mount Villard from Granite West Peak

Glacier/Villard Traverse - Class 3
Info coming soon!

Glacier Peak area panorama

Glacier Peak and Mount Villard traverse

West Face Chutes
Info coming soon!


Below is a map showing the routes on Glacier Peak:

Glacier Peak Map
RED: Goose Lake/Grasshopper Glacier Approach to the north and west faces

LIGHT BLUE: West Rosebud/Mystic Lake Approach to the north and west faces

PINK: Zimmer Lake/Wilse Pass Approach to the north and west faces

ORANGE: Aero Lakes Approach and South Slopes Route - Class 2

DARK BLUE: Beckey Couloir Route - Class 5.7 with 60 degree snow/ice

GREEN: Glacier Peak/Mount Villard Traverse - Class 3

Camping/Red Tape

The trailhead and first mile of the trail are within the National Forest however Aero Lakes and Glacier Peak lie within the Abasorka-Beartooth Wilderness. No motorized equipment is allowed. Please leave no trace.

Camping at Lower or Upper Aero Lake is all fantastic.

External Links

Weather Forecast

Avalanche Forecast

Absaroka-Beartooth Wilderness Info

Cooke City Information

City of Red Lodge

Stupidly Insane Trip Report

Glacier Peak

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