A nice drive-up summit - so long as you have a high clearance vehicle. Head north of Yakima on I-82. Use exit 26 and take Highway 821 2.6 miles to Selah Creek Drive. (Near 46.711° -120.466°)

Wind up the 3.6 miles of nice gravel that eventually turns into a pretty rough road to the summit at 3025 feet. The road is not suitable for a passenger car. Be sure and close the gate that you'll pass through. 

There is quite a bit of communication equipment on the summit but I experienced no particular RFI. People in this area don't seem to monitor 2m simplex frequencies but I was successful in working four on HF and another on 222MHz FM for the Spring Sprint (a surprising 250km with 25W and a mag mount on a pizza pan.)