Pronghorn complete the longest documented annual land migration of any mammal in the lower 48 — rivalled only by caribou in the Arctic. They can’t jump fences, which makes their corridors uniquely vulnerable. This map shows every USGS-mapped pronghorn migration corridor across the western United States — 22 herd units, 789 individually GPS-collared animals, and 2,019 tracked migration segments, recorded between 2002 and 2024.
Click any shape to see herd-level statistics. Filter by state to focus on the herds local to you, or pick a featured corridor at the bottom of the page to load that herd’s GPS tracks onto the map.
The pronghorn migration in numbers
The numbers behind this map come from a multi-decade effort by the USGS Corridor Mapping Team and state wildlife agencies across ten western states. For pronghorn, that effort has produced:
- 789 individual pronghorn tracked by GPS collar, often for multiple years each
- 2,019 migration tracks recorded between 2002 and 2024
- 22 distinct herd units mapped across ten states
- 49,806 km² of corridor identified from the GPS data
About pronghorn migrations
Pronghorn (Antilocapra americana) are uniquely North American — there are no other living antilocaprids anywhere on Earth. They are also the second-fastest land animal in the world (cheetahs are faster over short distances; nothing beats a pronghorn over a mile). Despite this speed, pronghorn cannot jump. Their migration corridors are uniquely vulnerable to fences.
The Path of the Pronghorn — the route from Grand Teton National Park south to the Sublette region of Wyoming — is the most-studied pronghorn migration on Earth. Archaeological evidence shows the corridor has been in continuous use for at least 6,000 years.
Pronghorn populations have recovered from a historic low of around 13,000 animals in the early 1900s to more than half a million today — but the recovery has been geographically uneven, and pronghorn corridor connectivity is the major remaining limit on further increases across the Great Basin.
Pronghorn herds by state
This dataset contains tracked herd units in the following states. Click a state to see every herd mapped within it.
- Wyoming — 8 pronghorn herd units
- California — 6 pronghorn herd units
- Arizona — 4 pronghorn herd units
- Nevada — 4 pronghorn herd units
- Oregon — 3 pronghorn herd units
Famous pronghorn migrations
A handful of pronghorn migrations are particularly well-known — for their length, their conservation history, or their cultural significance. Each has a dedicated page with full GPS track animation.
Path of the Pronghorn
The 150+ mile pronghorn migration through Wyoming’s Sublette region — the longest-protected migration corridor in the lower 48. 362 animals tracked.
Sheldon-Hart Mountain Pronghorn
Pronghorn moving between the Sheldon and Hart Mountain National Wildlife Refuges in the high sagebrush country of Nevada and Oregon. 30 animals tracked.
Explore the full picture
This page is part of MapScaping’s western big-game migration series. See the Western US Big Game Migration Map for the complete dataset, or browse migrations by other species: Mule Deer, Elk, Moose, White-tailed Deer .
