Rehabilitation of trail, joint activity with CORBA, MBU, Girlz Gone Riding. Met at Reagan Ranch parking lot for multiple shuttles into MSCP through back gate on Crags Rd. Parked adjacent to MASH site and hiked @ 0.2 miles to work site. Cleared brush and large debris piles from recent flooding, removed burned trees and branches that were impeding the route. Removed large to medium rock slides that had fallen onto the trail at 3 sections. Reconstructed washed-out tread in 3 areas, consisting of reinforcing the trail with rock and covering with dirt to create a path wide enough for safe use. Re-routed one section around large displaced drainage pipe. Removed a branch from very large downed oak that couldn't be otherwise moved and improved re-route around area. (That issue still needs attention.) Hiked out of worksite and shuttled back to Reagan Ranch parking lot after picnic lunch provided by CORBA Total volunteer hours: 36 volunteers x 4 hours = 144 hours Feet of trail maintained: ~2500