Boulder’s Open Space and Mountain Parks (OSMP) lands include more than 46,000 acres of protected open space, from mountain forests and rocky peaks to grasslands, wetlands, creeks, farms and wildlife habitat. More than 155 miles of trails provide opportunities to hike, walk, run, bike, climb, horseback ride, fish and experience nature. These lands are protected not only for recreation, but also for their plants, wildlife, water, agricultural lands, scenic landscapes and other natural and cultural resources.

Whether you're planning a hike, looking for a trail, bringing your dog, heading out on a bike, or simply looking for a place to experience nature, a little planning can help you have a safer and more enjoyable visit.

Choose Your Experience

Three people standing on a pier holding fishing poles while looking out a pond surrounded by greenery.

Know Before You Go

Snow covered mountains behind a white snowy field.

Protect Open Space

Green frog with darker green spots on a rock in water.

Programs & Activites

Woman in OSMP and the Arts Program

Related Services