DENALI NATIONAL PARK, Alaska – Videographer, photographer and conservationist Bill Watkins captured this incredible footage of a family of bears (mother and two cubs) using a wooden Denali National Park wildlife sign as an epic back scratch. He explains that nails used to be hammered into the signs to deter bears from using the signs, but that is no longer done in Denali.

According to Alaska Fish & Wildlife, bears typically rub their backs on the backs of trees and other objects to send a chemical signal, marking the area as their territory. They usually examine the object and sniff it thoroughly to see if it has been marked by anyone else before. Then, when it’s ready, they rub like mad against the wood, spreading their oils and scent. But it could also just be a way to relieve a bad itch.

Denali National Park is home to both grizzly bears and black bears. However, brown bears are not found in large groups like in Katmai National Park. They are much more solitary and usually travel alone or with their cubs.

Denali Park Road, where this video was shot, is the only road through the park. It is closed to private vehicles after the first 15 miles in the summer and after the first 30 miles in the spring and fall. Sable Pass has been closed to private vehicles since 1957.