Unit 851 · Costilla / Sangre South
About this unit
North Costilla and southeast Alamosa counties wrapping the south flank of Blanca Peak and the Sierra Blanca massif. Aspen and spruce-fir climb to alpine tundra above 13,000 feet on Blanca Peak (14,345 ft). Mix of Rio Grande National Forest and private ranch ground with Trinchera Ranch on the east.
- Blanca Peak (14,345 ft)
- Sangre de Cristo Wilderness
- Rio Grande NF
Public lands inside this unit
2 found
Trails near Unit 851
12 found
Highway of Legends
Difficulty: Expert64.5 miTrailReilly and Levsa Canyons
Difficulty: Difficult8.6 miTrailGoldenrod Trail
Difficulty: Moderate4.7 miTrailCulebra Peak Trail
Difficulty: Difficult4.6 miTrailCulebra Peak
Difficulty: Moderate4.6 miTrailSpanish Peaks Swa - Dochter Tract Trail
Difficulty: Easy2.7 miTrailSouth Shore Trail
Difficulty: Easy2.4 miTrailWormhole Loop Trail
Difficulty: Moderate2.3 miTrailOsita Ridge Trail
Difficulty: Moderate2.3 miTrailLong’s Canyon Trail
Difficulty: Easy2.0 miTrailLower Lone Cub Trail
Difficulty: Easy1.6 miTrailPoison Canyon Trail
Difficulty: Easy1.5 miTrail
Campgrounds near Unit 851
6 found
South Shore - Trinidad Lake State Park
Pricing varies — check with the operatorCampgroundTower 64 Motel & RV Park
Pricing varies — check with the operatorCampgroundPeaceful Peaks Glamping
Pricing varies — check with the operatorCampgroundCarpios Ridge Campground
Pricing varies — check with the operatorCampgroundMiddle Fork Resort
Pricing varies — check with the operatorCampgroundMonument Lake Resort
Pricing varies — check with the operatorCampground
On the books in Colorado
Species inventory is state-level — which units actually hold or permit each species varies. Verify unit-specific rules with the state agency linked above.
Official agency resources
Colorado Parks and Wildlife
- Hunting regulations ↗
https://cpw.state.co.us/rules-and-regulations
- Draw / lottery ↗
https://cpw.state.co.us/hunting/big-game/primary-draw
- GMU map ↗
https://ndismaps.nrel.colostate.edu/index.html?app=HuntingAtlas
- Harvest reporting ↗
https://cpw.state.co.us/thingstodo/Pages/Statistics.aspx
- Hunter education ↗
https://cpw.state.co.us/activities/hunting/education-and-outreach
- Buy a license ↗
https://cpwshop.com/
Authoritative source
Outdoors does not publish hunting regulations directly. For current season dates, bag limits, legal weapons, draw deadlines, and license costs in unit 851, go straight to the issuing agency.
Read the Colorado agency pageBoundary verified by Outdoors against the agency source on 10/25/2026.