This lake is formed from the Henry's Fork of the Snake River. It is a beautiful lake surrounded by lodgepole pine trees, with fantastic fishing, and located only about 60 miles north of Rexburg. This large reservoir is popular for boating, fishing and water skiing. Visitors may drive across the top of the dam for scenic views of the Centennial Mountains and Box Canyon.
Island Park Reservoir's body of water covers 8,400 acres. Boat ramps/docks are located at Buttermilk Campground, Island Park, Lakeside Lodge, McCrea Bridge Campground, Mill Creek and the West end. Camping is also available at Buttermilk, McCrea Bridge, Mill Creek and West End.
At a Glance
Boat ramp,Tent camping,Camping trailer,Fee charged for some activities,Picnic tables,Toilets,Parking
Fishing season is year-round for rainbow trout, cutthroat trout, coho salmon, yellow perch, and bluegill.
The Island Park Reservoir can be accessed by four different ways. The West End of the reservoir is accessed by driving north on Highway 20 approximately 18 miles and turning left onto the Green Canyon Road (this road also leads to Harriman State Park) and driving another 13 miles on a dirt road to the West End.
You can also drive to Ponds Lodge in Island Park which is ~27 miles north of Ashton, ID on Highway 20. Just past Ponds Lodge is a turnoff to the left that will lead back to the Island Park Dam and the boat ramp.
The next access is from the Yale-Kilgore Road which takes off of Highway 20 and Elk Creek, ~ 29 miles north of Ashton, ID on Highway 20. Turn left and drive 1 mile to the Buttermilk Loop Road. There is also a campground near the boat dock.
If you drive 3 miles down the Yale-Kilgore road and turn left at the McCrea campground there is a boat dock here also.
Rainbow Trout, Yellowstone Cutthroat Trout, Brook Trout Kokanee and Whitefish
Boating - Motorized
Boat docks are located at McCrea Campground, near the Island Park Dam, Buttermilk Boat Ramp and the West End Boat Ramp.
The West End Boat Ramp is accessed by driving north on Highway 20 approximately 18 miles north of Ashton, ID to Forest Road 167 (Green Canyon). This is also the road leading to Harriman State Park. You drive on a dirt road for about 11 miles and then turn right onto Rd 465 (West End Campground). There are numerous roads leading off of the main road - follow the main road until you reach the campground which will be on your right hand side. Take the road to the left across from the campground to get to the boat dock.