Kelly Flats

4.8/5 (47 reviews)
Laporte, Colorado (Larimer County)
Last Updated: 08/19/2022
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Trail Information

Highlights

Rough and rugged, Kelly Flats 4x4 Road is one of the more difficult trails in northern Colorado. Just west of the narrows in the Poudre Canyon, Kelly Flats is the only 4x4 trail that intersects directly with the Poudre Canyon Highway. The drive to the trailhead through the Poudre Canyon is stunning and breath-taking. Two distinct obstacles highlight this road: Heart Attack Hill and The Chutes. Both obstacles have bypasses, but even the bypass for Heart Attack Hill, known as Aneurysm Hill, can be difficult. Kelly Flats 4x4 Road can be unnerving for beginning off-road drivers and the optional obstacles can be difficult and challenging for experienced drivers with modified rigs. Put your transfer case in low range and enjoy this popular trail.

Trail Difficulty and Assessment

Trail Navigation

Kelly Flats 4x4 Road is a mixture of rock and dirt surfaces. The hill climbs on Heart Attack Hill and Aneurysm Hill are littered with large loose rocks and traction can be difficult. Heart Attack Hill can be difficult during ideal conditions and downright dangerous when wet. It is steep and lifting one tire off the ground on occasion can be expected. There have been roll-over crashes on Heart Attack Hill and extreme caution is advised. After reaching the top of the hill climbs, Kelly Flats 4x4 Road crosses through private property. Please respect the owner’s property rights by remaining on the road and driving at a reasonable speed. Past the private property lies the short, but extreme obstacle known as The Chutes. This is a route for modified rigs and off-road driving experience. Vehicle damage is likely here. The rest of the trail is a mixture of dirt two-track and occasional rock. Keep a keen eye out for elk and moose while in the forested area as they are often spotted.
This trail crosses private property in several locations. Please remain on the trail to preserve private property rights.

Trail Reviews

4.8/5 (47 reviews)
Status: Open
Visited: 09/25/2022
Difficulty Accuracy: Spot On

Cool trail, although I honestly expected more of a 4-wheely trail than a play area. The trail is in good condition but keep an heads up for those who don't have any trail etiquette.
Max
600
Status: Open
Rated 5/5
Visited: 09/03/2022
Difficulty Accuracy: Spot On

Ran this today in the Tundra with my buddy in his JLU. If you take the left side of HAH then it's super easy. I wouldn't attempt any other route with my rig but a built out jeep could. No way my Tundra could fit in the chutes so we bypassed and the rest of the trail was a breeze. Very fun trail!
Trail Review: Kelly Flats - Max
Trail Review: Kelly Flats - Max
Bill Andrews
Official Crew
37550
Status: Open
Rated 5/5
Visited: 08/19/2022
Difficulty Accuracy: Spot On

After spending the night on Wintersteen Park (the little spur loop near the bottom of Hear Attack Hill) we made our way up Kelly Flats as the first leg of a three day overlanding trip from the Poudre Canyon to Walden. We opted for the "easier" route around the bypass and up Anurysm Hill. It was challenging, especially for Rich's stock Ford Ranger but, by choosing his lines carefully and taking the less challenging options, he made it to the top unassisted. I was able to take some of the harder lines in my lifted Cherokee, although I did skip the very hardest. We were too busy weighing options and picking lines to take pictures on the way up. The rest of the trail was much easier, although very beautiful (we skipped the Chutes as well).
Trail Review: Kelly Flats - Bill Andrews
Trail Review: Kelly Flats - Bill Andrews
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Jake
400
Status: Open
Rated 4/5
Visited: 08/13/2022
Difficulty Accuracy: Easier

VERY fun trail! Great for exploring the limits of your rig. There are all sorts of options on Heart Attack Hill - off-camber rocks requiring careful line choice, near-vertical 5'+ boulder climbs, and a nice loose bypass trail for the less confident rigs (me). The gatekeeper is a great introduction to the trail as well. If you can confidently hit the gatekeeper, you can surely make it up Heart Attack Hill. You also hit 90% of the obstacles within the first mile of this trail (westbound), and the trail gets significantly easier after the Hill. The rest of the trail is a beautiful drive though the forests & meadows with spectacular views of the Rockies. I ran this in a Cherokee Trailhawk with 2" spacer lift and the rest (incl tires) bone stock. I did take the car up Heart Attack, but took the easiest route the whole way up. I believe we hit every other obstacle not on the Hill. The car had absolutely no problem whatsoever. I think if you do take every bypass, this isn't more than a 4 difficulty. Comparable to the easy lines on Pole Hill or Ironclads. I wasn't confident enough to try the Chutes, but I'll be back with some bigger tires & rock sliders!!
Mike
200
Status: Open
Rated 5/5
Visited: 08/06/2022
Difficulty Accuracy: Spot On

For those looking for a less intense adventure, I suggest starting at waypoint 9 for an out-and-back to the waypoint 7 (the Chutes) with ATVs or SxSs. There is a small parking area at waypoint 9 (for unloading ATVs) and this portion of the trail is easy to navigate yet fun with quads. I like taking the kids on this section and don't have to worry about vehicle damage or getting hung up. Also see moose regularly!

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