Colton, WA

ZIP code 99113 encompasses the town of Coulee City, a small community in Grant County, Washington. This area is primarily known for being the gateway to the Sun Lakes-Dry Falls State Park, which houses the Dry Falls, a former waterfall that stands as one of the largest known waterfalls in geologic history. Coulee City is also home to a variety of recreational activities such as boating, fishing, and hiking.