The trailhead for Hidden Lake Trail #745 to the top of Hidden Lake Peak Lookout is located at the end of five mile long Forest Service Road #1540, which junctions 9.5 miles up the Cascade River Road from Marblemount. The steep trail, with a elevation gain, starts in forest then transitions to wonderful wildflower filled meadows before climbing high into heather and rock gardens. The summit provides views of the peaks of the Ptarmigan Traverse, the stratovolcanoes Glacier Peak and Mount Baker, and other giants such as Forbidden Peak, Eldorado Peak, and Snowking Mountain.