The trailhead for Hidden Lake Trail #745 to access The Triad 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 starts in forest then transitions to wonderful wildflower filled meadows before climbing high into heather and rock gardens. From this transition zone the route leaves the trail to bear east and up to the top of the ridge where a boot path reappears.