From Spokane, take Hwy 195 south to Pullman. Follow Hwy 270 east. Hwy 270 jogs through downtown and continues to the University. Turn left on Stadium Way, then the first right turn onto Olympia. Olympia turns sharply to the left and uphill. Go past the stop sign at Chinook Drive. You will see the equine track downhill to your right and the observatory dome uphill to your left. Turn on Observatory Drive and park.

From Lewiston, take Hwy 195 north to Pullman. Follow Hwy 27, which becomes Grand Avenue, until you reach the downtown area. Turn right and follow Hwy 270 east to the University. Turn left on Stadium Way, then the first right turn onto Olympia. Olympia turns sharply to the left and uphill. Go past the stop sign at Chinook Drive. You will see the equine track downhill to your right and the observatory dome uphill to your left. Turn on Observatory Drive and park.

From Moscow on Hwy 270, turn right on Stadium Way, then immediately right on Olympia. Olympia turns sharply to the left and uphill. Go past the stop sign at Chinook Drive. You will see the equine track downhill to your right and the observatory dome uphill to your left. Turn on Observatory Drive and park.