South Yuba Trail is a rugged excursion of back country trail, following the South Yuba for close to 20 miles: ~16 miles from the little town of Washington to North Bloomfield Rd, and another 4 miles from there to Purdon Rd. Advanced/Black, this trail has some very narrow/edgy sections, often rocky too. Be prepared for anything, very remote zone; bring tools, water and food.