Salmon River Gorge Route

The Salmon River Gorge route in Kobuk Valley National Park follows one of the most spectacular limestone canyon systems in the American Arctic, carved by the Salmon River through the Baird Mountains in a landscape utterly without trails, roads, or any infrastructure. Access is exclusively by floatplane, typically from Kotzebue, landing on gravel bars along the Kobuk or Salmon Rivers. The gorge walls rise several hundred feet of exposed Devonian-age limestone, heavily weathered and karst-pitted, forming a labyrinth of towers and alcoves that local Inupiaq people have used as landmarks and hunting areas for thousands of years. The route requires river crossings, boulder scrambling, and navigation by map and compass. Grizzly bears frequent the salmon streams in August and encounter avoidance protocols are essential. Dolly Varden char and Arctic grayling fill the clear pools below the falls. Above the gorge the terrain opens onto Arctic tundra where caribou of the Western Arctic herd — the largest remaining caribou herd in North America — may pass in vast numbers during fall migration. The night sky above Kobuk Valley, far from any light pollution, produces exceptional aurora borealis displays from late August onward.