Angeline Lake is a freshwater lake located on the northern slope of Iron Cap Mountain between Otter Lake, Azure Lake and Big Heart Lake, in King County, Washington. Self-issued Alpine Lake Wilderness permit required for transit within the Big Snow Mountain area. West Fork Foss River exits Angeline Lake into a canyon that produces Angeline Falls downstream from Chetwoot Lake to Delta Lake. Because Angeline Lake is at the heart of the Alpine Lakes Wilderness, the lake is a popular area for hiking, swimming, and fishing golden trout, rainbow trout, and cutthroat trout.