Trico Mountain is a mountain summit located south of Stevens Pass on the common border of King County, Kittitas County and Chelan County in Washington state. Trico is a portmanteau of triple county. This peak is part of the Wenatchee Mountains, which are a subset of the Cascade Range, and is situated west of Leavenworth in the Alpine Lakes Wilderness. Trico is a triple divide peak with precipitation runoff from the mountain draining south into Cle Elum River, northwest into Deception Creek, and northeast into Leland Creek, which is a tributary of Icicle Creek. The scenic Tuck and Robin Lakes are set on the south slopes, between Trico and Granite Mountain, which is to the southeast. The Pacific Crest Trail skirts below the western aspect this peak as it crosses Deception Pass.