PM an email address and I'll send you a GPX file. It looks like a 230 mile loop from Roseville (80 and 65). Goes 80 to Colfax, out 174 to U Bet/Chalk Bluff to 20, then up to Hwy 49 at Yuba Pass on all dirt roads. Then down 49 to Downievile, back on dirt into Nevada City. Plenty of sight seeing along the route, should be an easy two day loop with no real technical riding.
Gas is available in Colfax, Downieville, and Nevada City so there are no gas issues. Plenty of camping up near Jackson Meadows or Milton Reservoir. Food available in Colfax, Washington, Sierra City, Downieville, and Nevada City
Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote. -Benjamin Franklin