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Length: 25 mi (40.2 km)
Surface: Singletrack
Configuration: Network
Elevation: -
Total: 5 riders

Mountain Biking Los Alamos County Trails

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#25 of 282 mountain bike trails in New Mexico
#1,407 in the world

I recommend using google earth and a cell phone or a map. The trailes branch to make different loops

with single track and some primitive roads some built almost a thousand years ago and some built to

protect the manhattan project. From easy to expert in small doses all in the town of Los Alamos in the

canyons in town.

First added by bogbike on Apr 17, 2011. Last updated Apr 28, 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
from Santa Fe head north on 84/285 turn in pajaque to Los Alamos at the Los Alamos highway and


drive to Los Alamos, NM. Travel through down town Los Alamos on Central Ave. At the bottom of a hill

the speed limit changes from 25 mph to 35 mph. A large blue building will be the most promimet


landmark. Pull into the parking lot on the right of the blue building, it is a swimming pool. The trailes all

start near the doors of the pool.
System trails (5)
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Los Alamos County Trails Trail map

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atkinsted (on May 13, 2020)
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Trail conditions

Dusty (on May 13, 2020)
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Mountain Bike Trails Near Los Alamos Nm, New Mexico

| 14 mi
| 14 mi
Intermediate | 5 mi
Advanced | 5 mi

Rider questions

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  • atkinsted
    Reviewing Quazemon:

    Snowy and muddy but over all pretty good.

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  • vanderhd
    Reviewing Guaje Ridge:

    Just to let anybody know who wants to ride this trail in late summer/early fall, the trail is completely overgrown and there are many many many thorn bushes for almost the entire extend of the trail. I rode it yesterday and it was brutal, strongly advise to not ride this trail during this time of year, you will not enjoy it!

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  • John Fisch
    Reviewing Perimeter Trail:

    This is not the most interesting trail in the Los Alamos system, but it is nice in that is remains shaded and serves as a great way to complete a singletrack loop with other trails in the area. It's also great for a quick spin if you haven't got time for a bigger ride.

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  • John Fisch
    Reviewing Cabra Loop:

    What a fun loop! The 1.5 miles of downhill is consistently entertaining with exposure, rocks, switchbacks, big views, and places where you can really open it up and play chicken with the remaining pines. The downhill leg of the counterclockwise loop also makes a fantastic finish to the Guaje Ridge downhill to wrap up an epic Los Alamos tour!

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  • John Fisch
    Reviewing Guaje Ridge:

    This is the crown jewel of the Los Alamos trail system. Remote, rugged, hard to access, dry and challenging from end to end, this one provides a near-epic sense of adventure. I rode it on my 26" hardtail, but would have had less pain on big wheels and/or a fully. There's a lot of descending in a short amount of time, some of it on loose surface, some of it on high-speed hardpack, and some on fairly wicked and fun rock drops and rollers. It's a lot of unpleasant work to get to this trail, but it is totally worth every drop of sweat.

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  • John Fisch
    Reviewing Pipeline Road:

    This is one ugly fire road. You can take "fire road" literally, as this area was destroyed by the great Los Alamos fire. What that means on the road surface is a lot of erosion and loose sand and gravel that will suck the life out of your legs. Some of the pitches, especially toward the top as you approach Guaje Ridge, are vicious. None but the fittest will ride the whole thing nonstop.

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  • John Fisch
    Reviewing Quazemon:

    4 stars for mostly doubletrack? In this case, sure. The fire scar has turned this old doubletrack into mostly exposed bedrock, full of fractures, ledges, and rollers, giving much of it an almost Moab/Porcupine Rim kind of feel. The climb is stiff and relentless, but not so much as you need a third lung to pull it off, and most of it is pretty entertaining, helping keep your mind off the pain. This makes the best climbing leg in the Los Alamos system and provides a great way to access the most excellent Guaje Ridge. But it's also a blast to scream down as an out-and-back or after climbing the lower portion of Pipeline Road.

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  • John Fisch

    This is a nicely varied network of trails that can be ridden from a number of trailheads around town. You can make is as long or short, as hard or easy as you like. As you get further from town, there will be more and more fire damage. A good route for seeing most of what the area has to offer starts by starting at the Quazemon trailhead, up Quazemon to Pipeline Road to Guaje Ridge, down Cabra Loop to Perimeter Trail and back to the Quazemon Trailhead. About 16 miles and 2600 ft of climbing.

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