Castlewood Canyon State Park is a Colorado state park near Franktown, Colorado. The park protects a unique part of Colorado's history (the Castlewood Canyon Dam).

Nature lovers and groups enjoy environmental diversity on several hiking trails ranging from mild to moderate. The trails range from .5 to 4 miles and can be combined for longer journeys. The winding Cherry Creek flowing along the canyon floor provides wonderful rest stops.  �Pets, on a leash, are welcome on most trails, except the new East Canyon Preservation Area trail.