Ptarmigan Lake Trail

Ptarmigan Lake Trail is an 8.6-mile out-and-back from the Iceberg-Ptarmigan Trailhead, with about 1,700 feet of climbing to a high glacial lake beneath Ptarmigan Wall. You pass Ptarmigan Falls and share the lower approach with Iceberg Lake hikers before taking the Ptarmigan branch. Plan roughly five to six hours, including breaks; the long return and two steep climbs make this a strenuous half-day. Ptarmigan Tunnel is a separate continuation beyond the lake, adding about two miles round trip and 600 feet of gain.

From behind Swiftcurrent Motor Inn, take the right-hand connector. It climbs about 185 feet in the first quarter mile, then eases after joining Ptarmigan Trail. The opening is relatively open, with mountain views; around 1.5 miles in, the path enters denser pine forest. At roughly 2.5 miles, a small clearing gives only a partial look at Ptarmigan Falls because trees and steep ground hide much of it. A rocky opening just above the falls makes a better place to pause.

Cross Ptarmigan Creek on the footbridge above the falls. About a tenth of a mile later, turn right at the junction to stay on Ptarmigan Trail toward the lake. The other branch heads to Iceberg Lake, a different hike from the same access. Keep the route to the lake; the trail's continuation past it climbs to Ptarmigan Tunnel and is not part of the distance here.

Beyond the junction, the trail gains more than 400 feet over about 0.6 mile through huckleberry brush. Bears feed in this corridor, so make noise near thick vegetation and water, travel in a group, and carry accessible bear spray. Above treeline, Ptarmigan Wall fills more of the view. At about 4.2 miles, cascades spill down Ptarmigan Creek just before Ptarmigan Lake. A short side path reaches the water; the main trail continues above the shore. The lake sits in a glacially carved basin, with Ptarmigan Wall to the west, 8,914-foot Crowfeet Mountain to the east, and the saddle toward the tunnel to the north. From the lakeside, keep some water in the foreground with the wall behind it.

The trailhead lot is small, reported at roughly 12 to 15 cars. If it is full, overflow parking in front of Swiftcurrent Motor Inn adds about a 0.2-mile walk to the start. A seasonal restroom is listed at the trailhead; no food or water service on the route was verified, so carry what you need for the full outing. Glacier's pet rule prohibits pets on trails. Check current trail conditions before setting out, especially late in the season when snow and bridge changes can affect high routes.