| Grant Lake | |
| Coords: | 37.3458°N -121.7192°W |
| Basin Countries: | United States |
| Elevation: | 15980NaN0 |
| Pushpin Map: | California#USA |
| Pushpin Map Alt: | Location of Grant Lake in California, USA. |
Grant Lake, also called Halls Valley Lake, is an artificial lake located in Santa Clara County, California. It is located 15980NaN0 above sea level within Joseph D. Grant County Park.