The Great Kobuk Sand Dunes, Alaska
Landform
Arctic tundra and the Great Kobuk Sand Dunes, a dune field north of the Arctic Circle, on a caribou migration path.
Field note
The National Park Service administers Kobuk Valley National Park. The Great Kobuk Sand Dunes are an active dune field above the Arctic Circle, surrounded by tundra. Caribou of the Western Arctic herd cross the Kobuk River, including at Onion Portage. There is no road in.





