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You will ride through three (3) connected parks. There's plenty of Single track to poach. Be courteous to the hikers and equestrian riders.
From the Sutherland entrance, you head East on Fossil Hill, at the first fork take the left and descend a small hill and veer right onto the Indian Creek Single (along a small pond..it is dry by late Summer)....head up and out of it, you'll come to fire trail, bear right onto Joaquin Ranch Trail and go around until you come to a street crossing. Bear left and the trail will start on the other side of the side of the street approx, 30 yrds up. Take that trail (paved) to the next trail head. Bear right and at the next fork, take the left..it will be one of the Twin Ponds trails. Climb to the end and at the next junction go left and then right again and start a nice steep climb. It will take you to the Ponds. Head up and out Hanging Valley Trail to the Briones-Mt Diablo fire roads and climb past Macedo ranch to Wall Point trail, descend into Pine Canyon/Stage Rd and ride the creek and creek crossings back to Shell Loop Trail back to Briones-Mt Diablo Trail. At the Borges Ranch Trail, head left back down to Twin Ponds and then take the Twin Ponds upper (North)trail....it will end at the same road as before...head West along Rock Spring place and retrace yourself back onto Indian Creek single track. Cross over Fossil Trail and connect into the last section of Indian Creek. It will connect to the Western section of Fossil Trail, turn left and climb back to Sutherland entrance.
Single track can be busy at times....most hikers will tell you it's illegal to be there...just nod and say something in a foreign language and move on.