Starts from a nice big parking lot in Smithflat. Less than a mile walk to the freeway overcrossing where noise gets annoying. Quiets down as you climb into Camino. Paved bike path ends in a few miles, turns to dirt trail that's fairly pretty but often close to houses. Eventually dead ends in central Camino.

Up to a 10 mile out and back, if you go to the end. More like 5 if you just do the paved part.