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Potholes Reservoir, WA

Bureau of Reclamation

Overview

The Potholes Reservoir is part of the Columbia Basin Project and formed by O'Sullivan Dam. Potholes refers to the many glacial depressions in ancient sand dunes here. These potholes and small islands make this area one of the best in Washington for birding. The best birding is from March through October: Sandhill cranes and waterfowl in late February, raptors in April, Sage Thrasher, Lark Sparrow, Burrowing and Long-eared Owls and shorebirds in May. With the August reservoir drawdown, the exposed mudflats attract shorebirds such as a variety of sandpipers, stilts, plovers and curlews.Area is open year-round. Additional wildlife information can be found here. Potholes State Park is also located on the reservoir and is administered by Washington State Parks. Reservations are available by calling (888) CAMPOUT or (888) 226-7688, or by clicking here. Access to the reservoir is adequate except west side is limited. Fish species include yellow perch, crappie, largemouth bass, rainbow trout, and walleye. Fishing is year-round.

Recreational Activities:

  • BOATING
  • CAMPING
  • FISHING
  • HIKING
  • HUNTING
  • PICNICKING
  • RECREATIONAL VEHICLES
  • WILDLIFE VIEWING

Address:

Washington Department of Fish & Wildlife
Columbia Basin Wildlife Area
6653 Road K NE
Moses Lake,WA,98837
Phone: 509-765-6641

Directions:

Site is located 15 miles south of Moses Lake off State Road 262. To visit south shore of reservoir, use State Highway 17 south from Moses Lake for 10 miles, west of State Hwy 262. For north shore, leave I-90 at Exit 169 (Hiawatha) west of Moses Lake, S to frontage road. East 2.6 miles. Before large towers, take dirt road to right to dike

Photo - Potholes Reservoir
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