Boulder Tank
Reservoir in Pima County, Arizona · on the USGS Spring Water Canyon quadrangle
31.77418, -110.54043
Maps that show Boulder Tank
Get them in the map app
Spring Water Canyon, AZ
USGS topo, 2021
Empire Mountains, AZ
USGS historical 15-minute topo (1958)
Nogales & Sierra Vista Ranger Districts -Back Motor Vehicle Use Map (MVUM)
Coronado National Forest
IFR Enroute Low Altitude Chart L-05 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-04 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).