The April 1, 2020 census count will begin months earlier in Alaska’s Toksook Bay, a rural village on the Bering Sea that can only be reached by dog sled, snow machine or bush plane when the ground is still frozen.

Counting people who live in hard-to-reach villages in the northernmost parts of the United States has been a challenge for the Census Bureau every decade since 1870. Even today, large portions of Alaska are not connected by roads and have spotty mail service.