Colorado Parks and Wildlife claims the best deal for Black Friday: nothing to be bought, but the benefits of nature to be gained.

It’s not Black Friday the agency recognizes, but rather Fresh Air Friday — free entry to the state parks the day after Thanksgiving.

It’s the 10th year of the tradition in Colorado, providing a chance to hike off the holiday feast and relieve the seasonal stress. Not to mention a chance to save on the cost of entry to the 42 state parks.

Some closest to Denver are known to get busy, including the red rock wonderland of Roxborough State Park and the scenic forests and meadows of Golden Gate Canyon State Park. Staunton State Park, the granite-filled mosaic near Conifer, sees comparatively lesser visitation.

A similarly rocky mosaic surprises on the plains between Denver and Colorado Springs: Castlewood Canyon State Park. The Pikes Peak region is home to two other state parks: Cheyenne Mountain State Park and Mueller State Park in Teller County.

Colorado Parks and Wildlife’s online calendar lists some special events on the day, with mention of hot soup while it lasts at Barr Lake State Park. The Great Waddle Walk-Off is set for the lake northeast of Denver.

As the day is a state holiday, some visitor centers might not be open or fully staffed.