Requiring a Shuttle San Gabriel Peak Trailhead to Eaton Saddle Trailhead, 3 miles, 1,411′ gain, 670′ loss. Silver Moccasin to Charlton Flats Shuttle Hike: 3.8 miles, 1310′ of gain, 670′ loss Upper Sunset Ridge Trail, Lower Mt. Lowe Railway, Echo Mountain, Lower Sam Merrill Trail to Cobb Estate: 6.2 miles, 1362′ gain, 1656′ loss Silver Moccasin to Vetter Mountain to Charlton Flats Shuttle Hike: 6.2 miles, 1660′ of gain, 1020′ loss Sunset Ridge Trail, Lower Mt. Lowe Railway, Echo Mountain, Lower Sam Merrill Trail to Cobb Estate: 7 miles, 1782′ gain, 1656′ loss