From Santa Rosa or to the South of Windsor:

Get on US-101 N 
Take the Arata Exit (after Shiloh and Main Windsor exits). 
Turn LEFT at Stoplight at bottom of offramp. 
Turn LEFT again at the next stoplight onto Old Redwood Hwy for just over 1/2 mile.
Turn RIGHT onto GODFREY DR. for 1/10 of a mile. 
End on right at 429 Godfrey Drive.

From Healdsburg or to the North of Windsor:

Get on US-101 S toward SAN FRANCISCO.
Take the first Windsor exit.
Turn RIGHT at stoplight at bottom of offramp onto OLD REDWOOD HWY.
Turn another RIGHT at next stoplight to stay on OLD REDWOOD HWY. 
After 6/10 of a mile, turn LEFT onto GODFREY DR.
After 100 yards, on right at 429 Godfrey Drive.