I-90-  Take the Ephrata exit (Exit 151) just east of George and follow signs to Ephrata. Turn left at 1st Avenue NW in Ephrata and drive past the Courthouse. Stay on that road and you will cross a cattle guard at the 15-mile point. of a mile past the cattle guard is our main entrance, Sagebrush Dr., on your left. There are basalt rock pillars on both sides of Sagebrush Dr. Follow signs to the Campground/Office which is about 1 mile off the highway. 

US-2-  Turn south on Coulee Meadows Road (note green and white Rimrock Meadows sign) 20 miles east of Waterville and 20 miles west of Coulee City. Drive 8 miles and look for an entrance sign on your right just past a brown house with a green roof, also on your right. Follow signs to the Campground/Office about 1 mile off of the highway. If you miss that turn, you will come upon the entrance described above.

 If you use Google Maps, the best address is 4177 Tumbleweed Way, Palisades, WA, 98845. It is not perfect but close.