Hiking Colorado Trails header

Diamond Lake

  • Diamond Lake Trail 1
  • Diamond Lake Trail 2
  • Diamond Lake Trail 3
  • Diamond Lake Trail 4
  • Diamond Lake Trail 5
  • Diamond Lake Trail 6
  • Diamond Lake Trail 7
  • Diamond Lake Trail 8
  • Diamond Lake Trail 9
  • Diamond Lake Trail 10
  • Diamond Lake Trail 11
  • Diamond Lake Trail 12

Photos by SQ

Diamond Lake

Area Boulder
Park/Forest Roosevelt National Forest
Trailhead Fourth of July
Distance Roundtrip 5.2 Miles
Elevation Start 10,100 ft
Elevation Gain ≈ 840 ft
Features Lake
Dogs Allowed? Yes, on leash


The hike to Diamond Lake starts at the Fourth of July Trailhead and travels along the Arapaho Pass Trail to the Diamond Lake Trail to Diamond Lake. The Diamond Lake Trail continues past Diamond Lake but the stats on this page are for just going to the lake. This hike has a lot to offer. Great views of peaks and rolling tundra above, a small pretty waterfall on the way and scenic Diamond Lake. If done in the height of summer this trail has amazing wildflowers. The Fourth of July Trailhead is busy and the parking lot can fill up. This hike is within the Indian Peaks Wilderness and wilderness regulations apply.

Directions info

Get Directions in Google Maps →
About 26 miles west of Boulder off 4th of July Rd


National Forest Trail Page
Trail Map PDF


The link to 'Directions in Google Maps' will open in a new window and give you directions from your current location to the trailhead. You can also change the starting location in the top field of the directions area. Note that for some rural trailheads the directions could route you to the nearest address it has, which could be a half mile down the road.

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