This is a brief but challenging climb in rural southern Sonoma County. If you are staying in, or riding through, the Sonoma township area (e.g. Sonoma, El Verano, Boyes or Fetters Hot Springs) consider diverting the few miles west to capture this climb. Steep throughout, you hit 10% immediately and end at 11.7%. There are a few nice views of San Pablo Bay and the East Bay as you reach the top of the climb. With a FIETS score of 3.47 over a 1.8 miles stretch, you earn your climbing stripes on this one!