Lakes / New Mexico / Rio Arriba County / San Gregorio Reservoir
San Gregorio Reservoir, New Mexico
35.93 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Mexico
36.04 degrees N, 106.85 degrees W - Rio Arriba County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How San Gregorio Reservoir Stacks Up
- Larger than 25% of the 309 lakes counted in New Mexico.
- About 57 miles from Santa Fe, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| San Jose Lakes | Sandoval | 11 mi | 32.78 acres |
| Fenton Lake | Sandoval | 13 mi | 29.4 acres |
| Laguna Madrid | Rio Arriba | 17 mi | 30.19 acres |
| Big Cornfield Tank | Sandoval | 25 mi | 30.64 acres |
| Gavilan Lake | Rio Arriba | 26 mi | 29.9 acres |
| Abiquiu Reservoir | Rio Arriba | 27 mi | 3,257.91 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About San Gregorio Reservoir
How Big Is San Gregorio Reservoir?
San Gregorio Reservoir covers 35.93 acres in Rio Arriba County, New Mexico.
What Is the Largest Lake in Rio Arriba County?
Heron Reservoir is the largest lake in Rio Arriba County, at 4,497.07 acres.
Largest Lakes in New Mexico
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Navajo Reservoir | San Juan | 15,363.3 acres | - |
| 2 | Elephant Butte Reservoir | Sierra | 10,908.51 acres | - |
| 3 | Ute Reservoir | Quay | 5,446.35 acres | - |
| 4 | Caballo Reservoir | Sierra | 4,617.43 acres | - |
| 5 | Heron Reservoir | Rio Arriba | 4,497.07 acres | - |
All 309 New Mexico lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 121198474). Verified October 30, 2026.