Ellensburg KOA Share: Campgrounds/RV ParksAgate HuntingChildren's ActivitiesFly FishingLodgingOutdoor FacilityRiver Rafting & Tubing Ellensburg KOA Visit Website 32 S. Thorp Hwy. Ellensburg, WA 98926- 925-9319 (800) 562-7616 925-3607 (fax) Hours: 8am to 8pm in-season About Map About Come relax and enjoy the outdoors! Fish, hike and bring the family (and dogs) and spend a day or week with us right on the bank of the world-famous Yakima River. What's Nearby? Distance: 5 10 15 20 25 50 mi.