It feeds in the morning and afternoon. When is is not feeding it spends its time sunning itself on rocks. It retreat to its burrow at night. The Olympic marmot is very social. It lives in family groups made up of one male, two or three females, a litter of year-old marmots, and the new litter.
Males mate with one female one year and another female the next year.
Family members greet each other by touching noses. They also groom each other.