Help care for your park, have fun, learn new skills and meet other volunteers. And best of all, admission to these programs is free! Declare war on noxious weeds! Join volunteers to rid Castlewood Canyon State Park of those pesky plants. We will go over weed identification before removing noxious weeds. Meet Ranger Mitch Martin and Volunteer Naturalist Linda Pohle at the Visitor Center. Reservations required, call 303-688-5242.