Touted as one of the best trout fishing lakes in Western Washington, Mineral Lake is no secret to many anglers. With over 100,000 fingerling rainbow trout planted each year, it’s no wonder why it’s regularly listed as one of the top picks by Washington State Department of Fish and Wildlife for the annual Lowland Lakes Opener in April. With Mt. Rainier as a most stellar backdrop, the picturesque scene in the foothills of the Cascades Mountains is worth the trip itself. Mineral Lake is located just miles outside the Nisqually Entrance of Mt. Rainier National Park.