JEWEL LAKE Tilden Regional Park Contra Costa County, California SCALE 0 50 100 feet ELEVATION 810 ft Spillway Island Boat Trail Road LEGEND Trees and Bushes 32 Broad-leaved Cat-tails Narrow-leaved Cat-tails Bottom Contours in feet N 3/11 /11 Prepared by GORDON W. GILSON April (4?) LAKE TEMESCAL Lake Temescal Regional Park Alameda County, California SCALE 0 50 100 feet ELEVATION 420 ft Spillway Dam Sandy Beach Wind Tower 19 10 7.8 & 2.5 Swimming Area Live Bloom Flycasting Floats depth not determined East Inlet LEGEND Native Trees and Bushes Weeping Willow Trees Narrow-leaved Cat-tails Broad-leaved Cat-tails Pampas Grass Water Iris Bottom Contours in feet Wooden Platforms and Rafts N 3/11 /12 Prepared by GORDON W. GILSON November (4?) South Beach Picnic Area