Green Mountain in Boulder, Colorado is a strenuous hike that offers fantastic views of the Front Range, Flatirons, and a wide panorama at the top of Green Mountain. The trails around Chautauqua park offer a several options to summit Green Mountain, letting you take your trail of choice, but in the trail profile below, we’ll point out the most direct route. Explore the full Green Mountain hike profile below for trail map, driving directions, and all the details you need to conquer this hike near Boulder.

Trail Snapshot: Green Mountain via Gregory Canyon Trail

Green Mountain Near Boulder Trail Profile


Parking was EXTREMELY busy when I visited on a Sunday morning, I had to park along Baseline road and many people were parking along residential streets. Don’t be turned off by this though, many come for the lower hikes, and visitors noticeably thin off as soon as you enter Gregory canyon to make your way up to the summit of Green Mountain. Gregory Canyon has its own trailhead parking area which requires a fee.

The 2013 flooding has closed the Gregory Canyon parking lot, but it’s a small lot anyway and most hikers will need to park along the road as I did–unless you plan to hit the trail before 7am. You can also begin your hike at Chautauqua park, and take the ski jump trail to the bluebell trail which will lead you to the Gregory Canyon trailhead. This will add 1.2 miles round trip to your hike, but will afford you great views of the Flatirons at the beginning of the hike.

Another option is to park along Flagstaff road near Realization Point, and to completely bypass Gregory Canyon and take only the Ranger Trail up. However, this trail profile of Green Mountain will feature a loop hike taking the following trails: Gregory Canyon to the Ranger Trail to the Summit, returning via the E M Greenman trail, then back down via Saddle Rock for a total of around a 5.5 mile hike. See the map link above to get a visual of the route.


Starting at the Gregory Canyon trailhead, you’ll notice that the first portion of the hike is very sun exposed. However, the Gregory canyon and Ranger and Greenman trails are probably ~80% shaded. There is some flood damage from 2013 floods, but the trail markings have been updated and are very clear (just make sure you read all posts at each intersection). The Gregory Canyon trail, like many others in the Chautauqua park area, has an orchard-like aroma because of all the flowers and fruit growing along the trail.

I noticed several families with children hiked Green Mountain from the Flagstaff Rd parking area, but noted that the smaller kids had to be carried at some points.

For Summiting Green Mountain you have two choices, Ranger or Greenman. Ranger has more carved steps and is mostly switchback in nature. Greenman seems to be fewer switchbacks, in favor for a more gentle climb. For this loop hike, take the Ranger trail up, and descent via the Greenman trail.

At The Summit of Green Mountain

The summit of Green mountain gives you a panorama view to both into Boulder in the East, and to the Rocky Mountains in the West. There is a unique bronze disk set into the granite at the summit. It points out and identifies the different peaks in the distance. Most of the year, except in July through most of September, you’ll be able to take in the snow-capped ridges and peaks of the Indian Peaks Wilderness area.

The Return Hike Down Green Mountain

Of course, you could descend the way you came, but why not take in some new trails and views. You can make this a loop hike by descending the Greenman trail. After about 1 mile, the trail will intersect with the Saddle Rock Trail. Take the Saddle Rock Trail back down to the Gregory Canyon Trailhead.
We want to thank Joe Quintana, a member of our Dayhikes Pathfinder Team, who hiked Green Mountain, gathered the information for the trail profile, wrote portions of this post, and took the photos for this hike. Thanks, Joe!

Tips & Resources for Hiking Gregory Canyon to Green Mountain:


Map & Driving Directions

Click for Driving Directions

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Aaron Johnson

Aaron Johnson has been hiking in Colorado for over 20 years. The owner and editor of Dayhikes Near Denver, Aaron writes every trail profile as a local guide who has hiked hundreds of miles of trails along the Front Range and deep in the Rocky Mountains of Colorado.