Knave: Potter Elk Horn, Redwood Canyon, Redwood Regional Park, Mariano Vallejo on March 01, 2020 1852 1965 alameda contra costa Elk Horn Fink Frickstad hike knave Mariano Vallejo Marier oakland prince's mill redwood canyon San Antonio Redwoods San Leandro Creek Sherwood D. Burgess Stein tribune +