Every Lake
San Antonio Reservoir
Built on San Antonio Creek to supply San Francisco, closed to the public since it filled.
- 9 ft · first step
- 18 ft
- 27 ft
- 37 ft
- 46 ft
- 55 ft · bottom
About San Antonio Reservoir
San Antonio Reservoir sits in the hills of Alameda County, formed by a dam across San Antonio Creek. The San Francisco Public Utilities Commission built it as part of the city's regional water system, which also carries water from the Sierra Nevada's Hetch Hetchy reservoir west across the Bay Area. The reservoir sits near Sunol and Pleasanton, a few miles from where Interstate 680 and Interstate 580 meet, in a stretch of grassland and oak hills between Fremont and Livermore.
Unlike neighboring Lake Del Valle, San Antonio Reservoir is closed to boating, fishing, and swimming because it holds drinking water for San Francisco customers. It appears as a long, branching arm of water visible from the Sunol Ridge and Calaveras Road, fed by seasonal creeks that fill its narrow coves. Bicyclists and hikers on the surrounding ridge trails can see it from a distance but cannot reach its shoreline. The reservoir covers roughly 682 acres and reaches about 55 feet at its deepest point.
- 6 depth layers, each step engraved with its depth in feet
- Compass rose, title block with coordinates, max depth and area; keyhole hanger on the back
Turn it in your hands
Live 3D of the actual cut files — drag to orbit, pinch to zoom. Every road you see is engraved on the real thing.
Viewer not showing? Open it full screen.
San Antonio Reservoir depth chart, in wood
This is a San Antonio Reservoir depth chart you can hang: 6 stacked layers of birch, each one a depth contour — 9 ft, 18 ft, 27 ft, 37 ft, 46 ft and deeper, down to the deepest hole at about 55 ft. The lake covers about 1.1 square miles. The shape of the bottom is the real one from published soundings, so anglers recognise their drop-offs and points.
A San Antonio Reservoir map for the wall — or a gift
Most of these go to a cabin wall, a lake house entry, or a home office; a lot are gifts — the family that has been on San Antonio Reservoir for three generations, the retirement move, the first boat. The 12-inch is the desk-and-shelf size; the 24- and 30-inch boards read across a room. Add a line under the title and star your place on the shore, and it becomes the map of your San Antonio Reservoir.
San Antonio Reservoir map — the details
How big is the map?
Four sizes: 12, 17, 24 and 30 inches on the long side, from $149. Every size is cut from the same depth data of San Antonio Reservoir; the bigger boards carry more shoreline roads and place names.
Is it made from real depth data?
Yes. San Antonio Reservoir is cut layer by layer from published bathymetric soundings — each layer of birch is a depth contour, so the shape of the bottom is the real one, not decorative.
Can I add my own place on it?
Yes. At checkout you can add a line under the title (a family name, a cabin name, a year) and star the spot on the shore that matters to you.
How long does it take?
Made to order in Waterford, Pennsylvania and shipped in 7–10 days; shipping is free in the lower 48.
Can you make a lake that isn't listed?
Any lake in the United States — we hold depth data for 104,419 of them. Search for yours; if it isn't built yet we build it when you order.
- 6 depth layers down to 55 ft
- 1.1 square miles of water
- Title block, compass rose and depth markers
- Birch plywood, keyhole hanger, made in Waterford, PA
