Castlewood Canyon State ParkCastles
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Castlewood Canyon State Park

4.8(3.6K)google
4.6(82)yelp
Per Vehicle · $10/$15USD(This is a natural canyon state park featuring historic dam ruins rather than a true castle; standard state park passes apply)
CanyonClimbingHikingOutdoor

Overview

Castlewood Canyon State Park is a Colorado state park near Franktown, Colorado. The park retains a unique part of Colorado's history, the remains of Castlewood Canyon Dam. Visitors can still see the remnants and damage from that dam which burst in 1933.

Practical Info

Every day6:30 AM – 8:00 PM
Suggested Duration2-4 hours
Best TimeSpring (April–May) or autumn (September–October) offers the most pleasant hiking climates. Late afternoon from 3:30 PM to 6:00 PM on a weekday is magical; the low-angle sun casts warm amber glows across the steep, rugged canyon cliffs, providing a solemn, quiet atmosphere to tour the historic 1933 castlewood dam failure ruins.
Getting ThereSituated near Franktown at 2981 S State Highway 83. From Denver, drive south on I-25 S to Castle Rock, take exit 184 for CO-86 E eastward for 6 miles into Franktown, then turn right south onto State Highway 83. Drive 5 miles to the main Canyon Entrance, offering developed paved parking loops and trail access.

Travel Tips

  • Operating within the Colorado Parks & Wildlife jurisdiction, the federal America the Beautiful Pass is entirely invalid here. Every checkpoint (split into East and West entrances) strictly mandates purchasing a CPW day pass at the self-service electronic kiosk and displaying it clearly on the dashboard.
  • The brush-filled canyon floor is prime wintering and hunting habitat for defensive Prairie Rattlesnakes along the Front Range. When tracking the historic Dam Ruins Trail, hackers must stay perfectly centered on the hard-packed dirt; sticking hands into rocky crevices or trailing with noise-canceling headphones is highly hazardous.
  • The state park is segregated into West (Canyon) and East parking systems. During peak weekend crunches (10:00 AM to 2:30 PM), the highly desired Canyon lot routinely hits maximum capacity under temporary barricades; deflect instantly and navigate to the East Entrance lot to bypass staging queues.

Reviews

Positive
  • The hidden canyon carved uniquely out of the flat plains features rugged rock cliffs that deliver unexpected visual wonder.
  • It preserves the masonry ruins of the historic 1890 castle dam collapse, adding great educational and historical narrative to hikes.
  • Located just 20 minutes from Denver's south suburbs, it's a quick, dog-friendly近郊 nature retreat free of commercial buzz.
  • The north visitor hub is modern, parsing parking efficiently with pristine restrooms and highly accurate trail mileage maps.
Heads up
  • The canyon floor trails are a jumble of loose talus; navigating rough boulder scrambles can easily trip casual hikers.
  • The preserve is a known habitat for prairie rattlesnakes; hiking narrow, brushy summer trails requires constant stressful alertness.
  • The shallow canyon loses cross-breezes in mid-summer, becoming a stagnant, scorching heat trap thick with stagnant creek bugs.
  • Holiday weekend rush hours bring long backup queues at both gates due to strict parking capacity caps, stalling entry.