| Hermosa Group | |
| Type: | Group |
| Age: | Carboniferous |
| Prilithology: | mudstone |
| Otherlithology: | shale, limestone |
| Namedfor: | Hermosa Creek |
| Namedby: | Cross and Spencer |
| Year Ts: | 1899 |
| Region: | Utah |
| Country: | United States |
| Coordinates: | 37.431°N -107.837°W |
| Subunits: | Honaker Trail Formation Paradox Formation Pinkerton Trail Formation |
| Underlies: | Cutler Group |
| Overlies: | Molas Formation |
The Hermosa Group is a group of geologic formations in Utah and Colorado. It preserves fossils dating back to the Carboniferous period.