Arrowrock Reservoir

Quick Facts

Arrowrock Reservoir


(208) 373-4007

Map Directions

Things To Do


Arrowrock Reservoir is formed by Arrowrock Dam which is part of the Boise Project. The Reservoir is managed by the Boise National Forest, (Boise National Forest map). This 18 mile narrow canyon reservoir of 3,150-acres has limited access to 60 miles of shoreline.

Boating, canoeing, windsurfing, and fishing are the major recreation activities at Arrowrock, located east of Boise. Fish species include rainbow trout, kokanee, yellow perch, whitefish, and the protected bull trout. Season open year-round. Reservoir acre feet and total reservoir capacity and cubic feet/second release rates for rivers below Boise & Payette River Basins reservoirs and select river locations are updated daily and graphically provided. Site offers: vault toilets, boat ramps and dock, parking, and dispersed camping.

The Boise Project furnishes a full irrigation water supply to about 224,000 acres and a supplemental supply to some 173,000 acres under special and Warren Act contracts. The irrigable lands are in southwestern Idaho and eastern Oregon.

Principal facilities include five storage dams (excluding Lucky Peak Dam constructed by the Corps of Engineers and Hubbard Dam a reregulatory facility) which form reservoirs with a total capacity of 1,793,600 acre-feet (active 1,663,200 acre-feet), two diversion dams, three powerplants with a combined capacity of 50,200 kilowatts, seven pumping plants, canals, laterals, and drains.

To facilitate organization of the administrative and operating procedures, the irrigable project lands are divided into the Arrowrock and Payette Divisions. Some of the features serve only one division; other features serve both divisions as well as other nearby projects.

Map of Arrowrock Reservoir

Latitude, Longitude: 43.602149, -115.854092



  • Boating

    Boat ramps and dock available for use.

  • Camping

    Dispersed camping with vault toilet access.

  • Fishing

    Fish species include rainbow trout, kokanee, yellow perch, whitefish, and the protected bull trout.

  • Hunting

    There is great hunting in designated areas.

  • Water Sports

    Boating, fishing, swimming.



Follow Idaho 21 to Mores Creek Bridge, about 18 miles, then take the road to the right to Arrowrock Dam.

Phone Numbers


(208) 373-4007