I drove by Tieton State Airport (4S6) on Rimrock Lake on Monday. The field was very firm (surprising considering the rain we had over the weekend) and smooth. It was about 80 degrees at 11 AM. The grass didn't look like it has been cut in the last few weeks, but nothing out there was taller than about 8". And the bathroom was clean. A good day.

Mid January 2019, it was a snowmobile race track. It is on the Fly Washington Passport program. South Central region.
http://www.flywashington.org/for-pilots.html

Looks beautiful. I bet it's in prime shape right now. It would be such a gem if there was no road access. I was there last July and the campground was packed.

Zzz wrote:…..I was there last July and the campground was packed.

Airplane campers, or automotive?

Usually dirt bikes and Jeeps, cheap beer and loud noise. It can get rowdy on the weekends.