From City of Chelan drive 6 miles West (uplake) on the Manson Highway (SR150) toward the Village of Manson, on the North shore of Lake Chelan.  Watch for a smaller highway sign on right with (Manson 2 miles in green and blue symbols for fuel/food/lodging shown below).  Turn left directly across from that sign onto Wall Street where you will also see the Mill Bay entrance sign.  Follow street toward lake.  (On the highway if you see turnoff to Mill Bay Casino you have driven 1/8 mile too far)