WA-281 Spur North at I-90 Exit 151 onramp. Use I-90 west for Seattle.
I-90 East - Exit 151
I-90 east approaching Exit 151 - WA-283 North/Ephrata/Soap Lake.
WA-281 Spur North at WA-283
WA-281 Spur North at WA-283. Use WA-283 North to Ephrata, Soap Lake and Grand Coulee Dam. Continue north on WA-281 Spur for WA-281 to Quincy and Wenatchee.