Fall Migration of Caribou

From U.S. Department of the Interior:

The fall migration of caribou takes them over sand dunes, past snow-capped mountains, under brightly colored forests and through the Kobuk River in Kobuk Valley National Park in Alaska. Onion Portage (seen here) is a National Historic Landmark where native Alaskans have gathered for 9,000 years to harvest caribou as they forded the stream. Photo by Matt Cameron, National Park Service. — at Kobuk Valley National Park.