Diamond Lake Trail

Roosevelt National Forest, Colorado 80436

Elevation Gain2,881ft
Trailhead Elevation10,737ft
Elevation Min/Max10559/11525ft
Elevation Start/End10737/10737ft

Diamond Lake Trail

Diamond Lake Trail is a hiking trail in Boulder County, Colorado. It is within Indian Peaks Wilderness Area and Roosevelt National Forest. It is 3.7 miles long and begins at 10,737 feet altitude. Traveling the entire trail is 7.5 miles with a total elevation gain of 2,881 feet. This trail connects with the following: Devils Thumb Trail, Around the Diamond Lake Route and Arapaho Pass Trail.

Diamond Lake Trail Professional Reviews and Guides

"One of the top high-country wildflower hikes on the Front Range, Diamond Lake Trail has in excess of 100 different kinds of wildflowers coloring sweeping slopes and intimate glens, as well as plenty of crystalline waterfalls along the way. Initially, the trail follows the same path as that of Arapaho Pass and Fourth of July Mine.

After 1 mile of steady climbing, Diamond Lake Trail branches off left and drops a few hundred feet before rising again to the lake. Both coming and going, hikers accumulate altitude losses and gains. Located on the south end of the Indian Peaks Wilderness Area at the Fourth of July Trailhead, Diamond Lake Trail is extremely popular. Wildflower alert: A “century” trail with more than 100 species of wildflowers at peak bloom."

"You have to squint to see a diamond shape in this lake, but the area around the lake presents the most spectacular wildflower display I ever have seen."

"This is a great short day hike up to a beautiful alpine lake surrounded by towering, rocky summits. The views on the first section of the trail are spectacular. Expect to see wildflowers, cascading glacier-fed waterfalls, and great views out to Woodland Mountain, Devils Thumb, and Mount Neva.

Trail conditions: The lower section of the trail is very popular and stays wet well into the summer months. The section from the Arapaho Pass Trail up to the lake is extremely wet, and there are several stream crossings. Expect to get wet. Most sections of the trail are well marked and easy to follow."

"This sparkling lake sits below the picturesque shoulder of Jasper Peak and is one of the
two closest lake hikes in the area, the other being Lost Lake. You can combine this with a hike to Jasper Lake if you want a more challenging, superscenic day. That combination could be an out-and-back, a car shuttle to the Hessie trailhead, or an overnight backpack."

Diamond Lake Trail Reviews

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I wish I would have had my pedometer on me b/c this hike feels much longer than 5 miles roundtrip from the Fourth of July TH. Beautiful stream crossings, waterfalls to view and the lake is wonderful. I would do this hike again. Due to the long winter and rainy summer, hundreds of flowers were still in bloom!
Great flowers, even though I was hiking to the lake to fish and don't know much about flowers. First time I have seen Glacier Lillies in ages. Be aware that the 1:24000 topo map linked to from this guide shows old trail routes which no longer exist. The trail sketch and description in this guide is correct. JW
The hike was incredible with colorful flowers and breathtaking views during the hike and at the lake. An alpine meadow next to the lake was a pleasant surprise. You'll find streams and waterfalls along the way!
Great day hike in the summer. The views were awesome. I also snowshoed to the lake in the winter. The trail is very hard to find with snow on the ground. Ended up going a roundabout way to the lake. Still beautiful in the winter
Beautiful, short day hike, pretty much as advertised in the trail guide. The directions to the trailhead are somewhat lacking, however; he makes no mention of the fact that the last 5.2 miles on CR111 are on a rocky dirt road (slow going, but passable in a non-4-wheel drive vehicle). Also does not mention to look for the signs for the 4th of July campground

Diamond Lake Trail Photos

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Trail Information

Roosevelt National Forest
Nearby City
Indian Peaks Wilderness Area
Additional Use
USDA Forest Service, Boulder Ranger District, 2140 Yarmouth Ave., Boulder CO 80301; (303) 541-2500; fs.usda.gov/arp
Local Contacts
Trails Illustrated Indian Peaks Gold Hill; USGS Monarch Lake, Nederland
Local Maps

Activity Feed

Jul 2018