Yakima Air Terminal - McAllister Field, Yakima, WA (YKM)
Correctly identified first by Thomas Wagner.

Although it's a big field, I always find friendly service at Yakima's McAllister Field. Home to a couple of FBOs and a great museum, Yakima makes a great stop anytime you're in the southern central Washington area - just watch out for Restricted Area R6714 to the northeast (it's almost always active, and they are reportedly shooting off some rather large fireworks in there).