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Level: Advanced
Length: 4 mi (6.4 km)
Surface: Singletrack
Configuration: Lariat
Elevation: +336/ -325 ft
Total: 39 riders

Mountain Biking Rattlesnake Gulch

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#582 of 1,353 mountain bike trails in Colorado
#6,037 in the world

Great scenery, especially at the overlook . It's a brute of a climb, hitting 20% grade regularly, but it's not that long. The trail is basically up to the rail road tracks, and then down. Do the loop counter clockwise as clockwise, the climb is steeper and has very loose rocks, making it tough. Careful on the downhill, as it's fast and there are plenty of steep trail sides.

First added by Rob on Sep 16, 2006. Last updated May 10, 2020. → add an update
Before you go
  • Drinking water: unknown
  • Lift service: unknown
  • Night riding: unknown
  • Pump track: unknown
  • Restrooms: unknown
  • Fat bike grooming: unknown
  • E-bikes allowed: unknown
  • Fee required: unknown
This trail information is user-generated. Help improve this information by suggesting a correction.
Getting there
It's in Eldorado Canyon State Park. From Boulder, drive south on CO HWY 93 5 miles to CO HWY 170. Take this west for 2.5 miles to the entrance to the park. The trail head is on the south side of the road, a couple of miles into the park. I park at the lot beyond the trail head, which is where this track is from.
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Rattlesnake Gulch Trail map

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(on Feb 5, 2023)
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  • broohaha

    Nothing new to add other than I took a fairly nasty spill here. As previously mentioned: very difficult beginning, resulting in a lengthy uphill climb, but some cool views and the remnants of an old hotel. Didn't do the loop, and went back down the same route. Basically made a mental error, not accounting for loose rock, and went over steep trail edge. Compared to the other rides I've done now, this is not one I'll do again. (Regardless of the fall.)

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  • protocol82

    Rattlesnake Gulch is a great trail for hiking but not ideal for biking. The beginning is virtually impossible due to hiking steps and loose rock. The view at the top is great and the ride down is fast and hectic. I would recommend checking out some free trails because its a 8$ to park at Eldorado canyon.

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  • CURLY007

    More of a hiking trail that a MTN bike trail, LOOSE shingle rocks that makes the steepness a tire spinning nightmare. Was OK I guess, great views of the divide but not worth the money to access the park.

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  • kuala_tahan

    Not a great trail. Pretty solid climb the way up, but not cool climbing - scree and such, not much fun. Way down isn't great either, because lots of people and not very good terrain. Underwhelmed. * Review edited 6/28/2009

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