Ask someone where to find outdoor adventure in Colorado, and they will usually mention Rocky Mountain National Park, Breckenridge, or the ski resorts along I-70. But there is a destination much closer to Denver that has been quietly building a reputation among adventure seekers: Castle Rock.
Located exactly halfway between Denver and Colorado Springs—about 30 minutes from either city—Castle Rock has transformed from a quiet suburban town into a hub for outdoor recreation. And as the operators of The EDGE Ziplines and Adventures, we have had a front-row seat to this transformation since 2015.
Philip S. Miller Park: 300 Acres of Adventure
The anchor of Castle Rocks outdoor scene is Philip S. Miller Park, a 300-acre recreational complex that locals call one of the best parks in Colorado. This is not your typical suburban park.
The most famous feature is Challenge Hill, a set of 200 stairs climbing a bluff with panoramic views of the Front Range. On any given Saturday, you will see fitness enthusiasts, families, and visitors making the ascent.
The park includes over 10 miles of trails for hiking, running, and mountain biking, an amphitheater that hosts concerts and community events, playgrounds and sports fields, and of course, The EDGE—Colorados largest aerial adventure park.
Adventure Without the Mountain Drive
Colorados marquee outdoor destinations are stunning, but getting there can be half the adventure. Weekend traffic on I-70 to the mountains is legendary for a reason. Castle Rock offers real outdoor adventure without the two-hour drive and the traffic headaches.
At The EDGE, guests regularly tell us they chose us specifically because we are close to Denver. Corporate teams book team building events here because employees do not need to sacrifice an entire day to travel. Families with young kids appreciate not spending hours in the car.
The Castle Rock Formation
The town gets its name from the distinctive rock formation visible for miles—a natural castle of rhyolite that has been a landmark since pioneers traveled the Cherokee Trail. Today, The Rock Park surrounds this formation with hiking trails and interpretive signs.
Getting Here
- From Denver: 30-37 minutes south on I-25, exit at Plum Creek Parkway
- From Colorado Springs: 37 minutes north on I-25
- From Boulder: About an hour via US-36 to I-25 South
- From DIA: About 45 minutes via E-470 to I-25 South
The EDGE is located at 1375 W Plum Creek Parkway, inside Philip S. Miller Park. Parking is free throughout the park.
Frequently Asked Questions
How far is Castle Rock from Denver?
Castle Rock is approximately 30-37 minutes south of downtown Denver via I-25, depending on traffic. It is located at the midpoint between Denver and Colorado Springs.
Is Philip S. Miller Park free?
The park itself is free to enter with no admission fee. Individual attractions like The EDGE require separate tickets. Parking throughout the park is free.
Ready to discover Castle Rock? Book your adventure at The EDGE and experience Colorados hidden gem for yourself.
