Kelly Flats

Total Miles 10.4
Technical Rating
9 Extreme
Best Time Summer, Fall
Trail Type High-Clearance 4x4 Trail
Accessible By
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Trail Overview

Head straight uphill from out of the Cache La Poudre River Valley and wind across a a ridge high above the Mummy Range. Two well-known obstacles, The Chutes and Heart Attack Hill. Both have bypasses, but they aren't easy. ATVs will have an especially hard time on this trail.

Photos of Kelly Flats

Difficulty

Difficult. The first part of trail is extremely steep and rocky. Middle is easy as it passes through a residential area. Last part can have large mud holes after a rain. Body damage is a frequent occurrence on the Chutes.

History

Prior to 2005, part of the trail around 'The Chutes' was graded smooth because of residential development in the area. 'The Chutes' themselves still remain intact and may be driven. Be careful not to miss them as you go by.

Technical Rating

9

Status Reports

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Jacob Heller
Oct 29, 2025
Open
A fun experienced trail. The trail does unfortunately come to an end past a few private party locations and you come to a Y where there is a home entrance to there house. And then the trail to the left there is a sign stating there is a gate that’s locked a few miles up. So you’ll have to back track and take the trail back to the beginning.
Evan Severs
Aug 30, 2025
Open
Beautiful area. I did this whole trail. I would not recommend it for anybody with less than a 3 inch lift on their tacoma or similar vehicle. I made it through with very minor scraping and no body damage but it was very stressful. It started raining later in the day and we would have been stuck out there if we were on the earlier obstacles while it was wet. Do not do what we did and venture out alone. At a certain point there’s no turning back but the trail does get easier after a while. We have no skids and no sliders, took the bypasses which were a lifesaver. The Chutes are no joke we never would have made it through that. Be safe out here we only saw two groups the whole trip. we did get on the trail at around 4 to be fair. The bypass for heart attack hill is not easy. The bypass for the chutes is. If Onx tells you there’s a road you can take to get off part way through, they are lying.
Josh O
Jul 12, 2025
Open
7 or 8/10 difficulty. All the hard lines were doable on IFS with a rear locker, 2” lift, 33s, and some sliders. No one else up there, pretty dusty but otherwise super fun
J H
Jun 28, 2025
Open
7 vehicle group, busy day but no rain in a week or so. Went well.
Josh sannes
Jun 21, 2025
Open
L K
Jun 14, 2025
Open
Rock slab was washed out at the top of heart attack hill, a couple water crossings (one was fairly deep) but overall good.
m m
May 25, 2025
Open
Trail is open, muddy & wet throughout. Top of heart attack hill at base of slab is rutted out, chutes chewed up from SXS’s. Back half is muddy with a couple shallow mud puddles only.
Joel Crane
May 16, 2025
Open
Super nice day, ground was damp but not crazy muddy. Absolutely no traffic which was awesome. Great trail with a few challenging obstacles.
Shawne Z
Nov 24, 2024
Open
Steve Gardner
May 27, 2024
Open
Manny C
May 27, 2024
Open
First time on this trail, but was with experienced jeepers. They said it was a little tougher than last year and more fun. Overall, great day and great trail!
Chase Hanusa
May 15, 2024
Open
road closed sign was up and gate was closed. Hopefully it will open next weekend.
Wes Back
May 15, 2024
Open
Trail is still closed. Sign said it typically opens mid May.
Charlie Murphy
Nov 19, 2023
Open
Stephanie Grooms
Nov 12, 2023
Open

Kelly Flats Trail can be accessed by the following ride types:

  • Single Track
  • 50 Inch
  • 60 Inch
  • High Clearance

Kelly Flats Map

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