Colorado’s mule deer herds include the famous White River population — the largest in the country — plus long-distance migrations across Middle Park, North Park and the San Juan Basin. This map shows every USGS-mapped big-game migration corridor in Colorado — 7 herd units, 0 GPS-collared animals, and 0 tracked migration segments, recorded between None and None.
Click any corridor or stopover for herd-level stats. Toggle species on and off in the controls above the map, or pick a featured corridor lower on the page to load real GPS tracks onto the map.
Big-game migration in Colorado by the numbers
- 7 mapped herd units
- 0 individual animals tracked by GPS collar
- 0 GPS migration tracks recorded between None and None
- 24,512 km² of migration corridor identified
- 0 stopovers — critical rest and refuel sites along the corridors
Species tracked in Colorado
Every tracked herd unit in Colorado
The complete list of USGS-mapped herd units that include Colorado. Cross-border herds shared with neighbouring states are included.
- Elk: East Gunnison herd — 0 tracked animals, —
- Elk: San Juan herd — 0 tracked animals, —
- Mule Deer: Middle Park herd — 0 tracked animals, —
- Mule Deer: North Park herd — 0 tracked animals, —
- Mule Deer: San Juan Basin herd — 0 tracked animals, —
- Mule Deer: Taylor Park herd — 0 tracked animals, —
- Mule Deer: White River herd — 0 tracked animals, —
What threatens migration corridors in Colorado
Across the West, the biggest threats to big-game migrations are not the things that kill individual animals — they’re the things that fragment the corridor itself. Energy development, road crossings, fences and subdivision of winter range have all been documented as drivers of corridor loss in this dataset. State wildlife agencies, the USGS Corridor Mapping Team, and conservation NGOs are now using maps like this one to guide decisions about where to build wildlife crossings, where to replace woven-wire fences, and where to prioritise conservation easements on private winter range.
Explore further
This page is part of MapScaping’s western big-game migration series. See the Western US Big Game Migration Map for the complete dataset across all ten states, or browse a different state:
