Calistoga Classic Start Calistoga Spa Hot Springs Mileages are appoximate Approximate miles from - Direction Start Point above 0.0 Start 0.1 0.1 South onto Silverado Trail (Right) 5.5 5.4 East on Crystal Springs Road (Left) 8.0 2.5 North on Sanitarium Road (Left ) at stop sign 9.5 1.5 North on Deer Park Road 11.0 1.5 Stay on Howell Mountain Road 17.0 6.0 Regroup/Rest Stop in Pope Valley 17.0 0.0 North/West on Pope Valley Road (left from Howell Mt) 21.0 4.0 Name change to Butts Canyon Road (at Aetna Springs Road) 36.5 15.5 Regroup/Rest Stop in Middletown 38.0 1.5 South Hwy 29 (to Calistoga) (Left) 52.2 14.2 Stop at Calistoga Spa Hot Springs