Philip S. Miller Park in Castle Rock Offers Year-Round Trails, Ziplines

The Town of Castle Rock opened Phase One of Philip S. Miller Park to the public at 1375 W Plum Creek Parkway in Castle Rock on October 25, 2014, creating a 300-acre regional park that now combines trails, event venues and a public-private zipline operation. The park address is 1375 W Plum Creek Pkwy and the Town lists a general park phone at 303-688-5555.

Town of Castle Rock materials list an 8-mile native-surface singletrack network divided into four interconnected loops plus an additional 1-mile paved accessible trail that circles the park. A travel guide lists the network at 8.5 miles and notes that the Wolfensberger Pedestrian Bridge connects Philip S. Miller Park to Ridgeline Open Space, creating a combined 17-mile loop across 650 acres of connected open space. The Town publishes downloadable park maps and brochures and a trail-conditions page for users.

Fitness users and families have focused on the park’s Challenge Hill, a fixture described on the Town site: "The trail's shining jewel is the 200-step Challenge Hill. Rising 178-feet in elevation, it's a lot tougher than it seems, but the views at the top are hard to beat." The park also contains a 2.5-acre Adventure Playground with a 40-foot slide, a full-size synthetic-turf field adjacent to concrete pathways and lighting, and the Millhouse events center and outdoor amphitheater used for concerts, races and festivals.

A public-private partnership brings The EDGE Ziplines & Adventures to the park edge, offering multi-level EPIC Sky Trek courses with a minimum age of 4 for some activities and staffed guides. The operator states, "Our goal is for adventurers of all ages to have an exciting day!" and that "Each zipline guide completes an intensive training and certification program." The EDGE lists operating hours as 10:00 am to 4:00 pm and advertises a 24-hour full-refund window after booking plus a Trip Assurance add-on to cancel up to 24 hours before an outing.

Event and facility rental rules on the Town site require general liability insurance of at least $1,000,000 and that the Town of Castle Rock, its officers, officials and employees be listed as additionally insured. The Town also lists a 30-day cancellation period for rentals, pavilion reservation options, and the RockREC app for registering programs, paying fees and securing facility rentals.

Castle Rock, the Douglas County seat with a 2020 population of 73,158, promotes Philip S. Miller Park as a year-round destination less than five miles south of The Outlets at Castle Rock and accessible from I-25 at exit 182. VisitCastleRock notes the park supports the town’s event programming and that "the 300-acre Philip S. Miller regional park provides its own plethora of events to the community." For visitors planning a trip, the Town provides phone contacts for park offices and facilities, including the Recreation Center at 303-660-1036 and the Miller Activity Complex at 720-733-2222.