Alice Lake, Glacial lake in Blaine County, US.

Alice Lake is an alpine lake in the Sawtooth Wilderness of Blaine County, Idaho, at 8,602 feet (2,622 m). It is one of the largest lakes in the wilderness, framed by rocky peaks; to the east rises El Capitan at 9,901 feet (3,018 m). The lake can stay frozen into early summer.

Alice Lake lies in the Sawtooth Wilderness of Blaine County, Idaho, within the Sawtooth National Recreation Area. The lake sits at 8,602 feet (2,622 m) and is one of the largest in the wilderness. It is framed by the Sawtooth Mountains, with El Capitan rising to 9,901 feet (3,018 m) to the east. The lake can remain frozen into early summer.

The lake lies in the Sawtooth Wilderness, where visitors register at a permit box on the trail at the wilderness boundary, at the upstream end of Pettit Lake. The name Alice Lake is shared with the surrounding Sawtooth National Recreation Area landscape, and the lake sits below El Capitan, the 9,901-foot peak to its east.

The route starts at the Pettit Lake campground trailhead, reached from State Highway 75 via Sawtooth National Forest road 208. The trail runs about 5.5 miles (9 km) and climbs roughly 1,600 feet (490 m), with five stream crossings, only the last bridged. Wilderness permits are taken from a registration box at the wilderness boundary at the upstream end of Pettit Lake.

Alice Lake sits at 8,602 feet (2,622 m) and can stay frozen into early summer, so the basin often holds snow and ice while lower Pettit Lake is already open. The trail from the Pettit Lake campground covers about 5.5 miles and climbs roughly 1,600 feet, crossing five streams; only the last crossing has a bridge.