How do you count visitors on 26,000 square miles of Alaskan forest?

The U.S. Forest Service is midway through a multi-year study to determine how many people visit the nation’s forests and what they do once they get there. In the Tongass — the nation’s largest forest — this seemingly straightforward work is complicated by the fact that there is not a single turnstile or ticket booth on any of its 17 million acres.

Robert Woolsey, KCAW – Sitka