Henrys Lake is a premier trophy trout fishery nestled in northeastern Idaho at an elevation of 6,470 feet, making it the highest state park in Idaho's system. This 6,000-acre alpine lake sits in a volcanic bowl surrounded by the stunning Centennial Mountains to the south and Henrys Lake Mountains to the west. With an average depth of 12-15 feet and a maximum depth of 28 feet, the lake is relatively shallow with abundant weed beds that create ideal fish habitat. The fertile waters of Henrys Lake have earned it the reputation as a World Famous Trout Fishing Area, known for producing some of the largest trout in the country. Located just 15 miles west of Yellowstone National Park, the lake features approximately 25 miles of shoreline in a bowl-like shape and serves as one of the headwaters of the Snake River.