Moses Lake, on which the city lies, is made up of three main arms over long and up to one mile (1.6 km) wide. It is the largest natural body of fresh water in Grant County and has over of shoreline covering . Before it was dammed in the early 1900s and then incorporated into the Columbia Basin Project, Moses Lake was a smaller shallow lake., USGS, GNIS To the south of the town is the Potholes Reservoir and the Columbia National Wildlife Refuge that has a number of seep lakes and vast amounts of migratory birds and other fauna natural to the area.
Moses Lake, on which the city lies, is made up of three main arms over long and up to one mile (16 km) wide. It is the largest natural body of fresh water in Grant County and has over of shoreline covering . Before it was dammed in the early 1900s and then incorporated into the Columbia Basin Project, Moses Lake was a smaller shallow lake., USGS GNIS To the south of the town is the Potholes Reservoir and the Columbia National Wildlife Refuge that has a number of seep lakes and vast amounts of migratory birds and other fauna natural to the area.