Island Park Reservoir which is formed by Island Park Dam is a major feature of the Mindoka Project. Recreation on this 11 square mile (7,000-acre) reservoir with 64 miles of shoreline is administered by the Targhee National Forest. Located in the high country of eastern Idaho, north of Idaho Falls. At Island Park Reservoir, fishing season is year-round for rainbow trout, cutthroat trout, coho salmon, yellow perch, and bluegill. The Island Park area offers excellent trout fishing at Island Park Reservoir and along the Henry's Fork,Buffalo River, Warm River, Fall River and Bitch Creek. Reservoir acre feet and total reservoir capacity and cubic feet/second release rates for rivers below Upper Snake River Basin reservoirs and select river locations are updated daily and graphically provided. Season open year-round. Boat ramp elevations.

Directions: Located immediately west of U.S. 20, between Ashton and Big Springs.