You can't go wrong with the trails in this enchanting canyon park. But awesome views and challenging ascents distinguish Eldorado Canyon Trail from the rest. $8 entrance fee for the State Park and only 45 minutes from Denver!
Eldorado Canyon Trail makes for a great day hike, with great views and a steady, challenging uphill – bring lots of water!
For something shorter, try Streamside Trail (1 mile roundtrip), Fowler Trail (1.4 miles), or Rattlesnake Gulch (2.8 miles). Streamside, appropriately, leads you alongside a creek, while Fowler has great views of the canyon. Rattlesnake gains the most elevation of the three, taking you to the Crags Hotel ruins.