Caribou swimming across the Kobuk River during their fall migration. Kobuk Valley National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kova4369.html Arrigetch valley with caribou. Gates of the Arctic National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.gaar0029.html Young caribou on the shores of the river. Kobuk Valley National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kova4406.html Spruce and lone caribou swimming across the river. Kobuk Valley National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kova4402.html Caribou crossing the Kobuk River during their fall migration. Kobuk Valley National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kova4365.html