Green Mountain via Gregory Canyon, Ranger, E.M. Greenman, Saddle Rock and Amphitheater Loop

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Boulder Open Space

Green Mountain via Gregory Canyon, Ranger, E.M. Greenman, Saddle Rock and Amphitheater Loop is a 4.6 mile heavily trafficked loop trail located near Boulder, Colorado that offers the chance to see wildlife and is rated as difficult. The trail is primarily used for hiking, running, and nature trips and is best used from April until October.

Length4.6 miElevation gain2,342 ftRoute typeLoop
HikingNature tripsRunningForestViewsWildlifeSnow
Description
Waypoints (0)

Please be advised that dogs not allowed on the last half of the loop (EM Greenman Trail).

Weather
UV Index
Daylight
Reviews (327)
Photos (2,604)
Activities (338)
Completed (1,523)
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Kelly Jensen
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Hiking

Still a bit snowy at top of em greenman.

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Kelly Lara
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Hiking
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Victoria Valades
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Hiking

Pretty snow covered, but all packed snow. Spikes needed for sure. Beautiful!

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Nathan Todtenhagen
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HikingGreat!Icy

Icy spots near the beginning, end, and the initial descent from the summit on E.M. Greenman. Spikes definitely helpful!

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Chris Pitcher
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HikingIcy

This trail is one of our faves and we did it last weekend. It was warm but there were still patches of ice. I did it without crampons but they would have been useful at times.

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Kelsey Wood
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Hiking

Hiked 2/1. Icy in many spots among loop. Wore spikes the whole time, but definitely some areas where they’re not necessary. Went up Gregory Canyon Trail & down the other side of the loop. Steeper & icier on the Saddle Rock/Amphitheater side, so keep that in mind when choosing your loop direction!

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Lena Chase
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HikingIcyRocky

Definitely would recommend spikes and poles to manage the icy trails. Even if it’s not visible, there were plenty of points where the ice was covered by a thin layer of dirt that made it really slippery.

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Michael Banker
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Hiking
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Alex Reisenweber
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Hiking

Beautiful morning hike. Got to the trailhead at first light. Only a couple other cars before me. Had the trail pretty well to myself on the way up. Great views from the top in all directions! I did it with no spikes but they would have been nice in a few spots!

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Ray Marks
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Hiking

Loved this trail. My favorite in Boulder so far. Love how forested it is. Spikes helped at beginning and end where it’s very icy.

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Nathan Todtenhagen
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Hiking

Very icy in spots, definitely bring spikes!

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Z. Zhang
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HikingIcy
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Amanda Herschleb
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Hiking
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sudhir tripathi
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Hiking
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Ari Nateman
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HikingGreat!

Difficult but beautiful hike!!

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Michael Stanley
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Hiking
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J T
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Hiking

Nice hike through the forest.

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Molly Riiff
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Hiking

Great hike. Only one small patch of snow on Sunday 9/12. Enjoyed it even more than Arch, which we did yesterday. Also, a lot less crowded than Arch and more mask wearers. We started both hikes around 9am.

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Scott Vegas
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Hiking

Steep incline to the top. The decline is pretty slow and rocky. Great views at the top.

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Dylan Sorrell
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Hiking
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Jorgen Norgaard
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Hiking

Challenging up and down. We went by the Ranger Trail, making our hike more spicy!

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Tiana Cannon
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Hiking

Overall a beautiful trail and worth it! The trail completed was about 6.9 miles with a good elevation gain. The ladder on Saddle Rock Trail gets pretty hot!

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California Bonham
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Hiking
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Maya S
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Hiking

If taking the loop counterclockwise, be sure to take the correct trail on your way back down, connecting to Ranger Trail which is hidden in a sharp right fork that’s easy to miss! I got lost in the scenery and went the wrong way a couple of times, so be sure you know where you’re going - or that your phone is fully charged. Overall one of my fav Boulder hikes!

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Matt Folsom
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HikingRocky
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Hannah Roberts
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Hiking

Did this in reverse and skipped Amphitheater. Started on Saddle Rock to E.M. Greenman, then came down Ranger to Gregory Canyon. Last time I did it was in the snow and using Microspikes, this time went a lot quicker with no ice! Took me about 3 hours and 20 minutes at a VERY leisurely pace with a bum ankle.

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Max Sheehy
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HikingRocky

Awesome hike to kickoff this weekend in mid-July! Enter the trail loop from the right (counter-clockwise) for an easier ascend (although still difficult). Begin on the left trail (clockwise loop) for the more challenging, technical option.

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Franciele Caroline
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HikingBugsRockyScramble

Great Monday trail to wake up the body!

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