Why we love it: The seclusion. This is the longest trail in the park, it’s not kid-friendly, and you can’t bring dogs, so traffic is minimal. When to go: Morning or early afternoon. Allow two to ...

Cost: $9 daily vehicle pass or free entry with an annual state parks pass ($80 to $120) Castlewood Canyon’s west parking lot is relatively quiet because it sits on the opposite end of the park from ...