National Geographic : 2018 Jun
On their way through the Brooks Range, in the Arctic National Wildlife Refuge, the 218,000 caribou in the Porcupine herd crowd into a narrow valley, and a few end up in Lake Peters. The refuge stretches from the mountains to the Beaufort Sea, covering 19.3 million acres. PREVIOUS PHOTO In spring the caribou migrate to the refuge’s coastal plain. There they spend six weeks grazing on tundra, giving birth, and dodg- ing mosquitoes and predators—including Alaska-native hunters, for whom caribou are a crucial resource. The coastal plain is also where the oil may lie.