Moses Lake is located between Ellensburg and Spokane on I-90. From west of the Cascade Mountains, take I-90 eastbound. From the Spokane area, take I-90 westbound.
Potholes Reservoir is located just south of Moses Lake. From exit 179 off I-90, take Highway 17 south. Turn right off Highway 17 onto Road "M" and continue south to the stop sign/"T" in the road. Take a right at the "T" and continue over the dam to Potholes Reservoir.