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A nice little tour of the offerings at Stone Quarry.

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8,195' 2,498 m


7,885' 2,403 m


865' 264 m


866' 264 m



Avg Grade (2°)


Max Grade (7°)

Dogs Off-leash

E-Bikes Unknown

Features Views

Family Friendly This is a good zone for families - you can easily shorten the ride, the trails are not inherently technical but you can make them more challenging by playing on optional rock features along the way.

No motorized use. Limekiln trails (just to the south) are open to motorized use.


Stone Quarry is a nice zone about halfway between Del Norte and Monte Vista. It has some really awesome topography that features large boulders and rock slabs. Views of the Sangre De Cristo range abound.

Need to Know

There are NO trail markers or signs here. Make sure you have the MTB Project mobile app updated and you wont have any issues. Be rattlesnake-aware at all times.


From the trailhead near the gun range, pedal up Vision Quest which climbs gradually to a high point with great views. The trail features a mixed tread with some rock but nothing technical. Once you top out on the ridge, you'll be greeted with great views of the San Juan Mountains and Stone Quarry area to the west, the entire San Luis Valley to the north and the Sangre de Cristo Mountains to the east. A quick descent from the ridge will put you in the valley with access to Jer's Ridge and Monster Slayer.

Briefly follow the road to the north and look for Jer's Lair to branch off to the left. A quick pedal on Jer's will bring you to yet another junction - stay right here to join Monster Slayer.

Monster Slayer is a winding trail that's made great by the line choices. The actual trail is routed such that most beginner/intermediates will be challenged but not in over their heads. Advanced and expert riders will find tons of opportunity to choose their own adventures as the rock formations here beg to be ridden. Bottom line: take your time riding this one and keep your eyes out for fun lines on the rocks.

When you're done on Monster Slayer, bang a right onto Duran Land and enjoy more of the same. At about mile 5.5, you'll come to a point where Duran Land veers sharply left near a barbed wire fence. If you follow it, it turns into a doubletrack so it's recommended to turn around here and retrace your path.

When you get back to the junction with both Monster Slayer and Jer's Lair, choose your own adventure. Jer's Lair is much more direct (as mapped here) but if you're looking for extra miles and want to mess around on the rocks some more, ride Monster Slayer back in the other direction.

History & Background

Most of the older buildings in Del Norte and Monte Vista were built using stone that was quarried from right here. You'll pedal right past the quarry sites on this ride!


Shared By:

Brian Smith with improvements by B Flynn

Trail Ratings

  4.4 from 30 votes


  4.4 from 30 votes
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in Colorado


21 Views Last Month
7,245 Since May 31, 2016
Intermediate/Difficult Intermediate/Difficult



Winding down through the Monster Slayer's big boulders.
May 30, 2016 near Del Norte, CO
Riding through an open area near the end of Monster Slayer.
May 23, 2017 near Del Norte, CO
Alternate paths near the top of Jer's Lair.
May 23, 2017 near Del Norte, CO
Entering the rocky climbing section near the start of Jer's Lair.
May 23, 2017 near Del Norte, CO
More fun rock riding on Monster Slayer.
May 24, 2016 near Del Norte, CO
Jason finding a fun and creative line on Monster Slayer!
May 24, 2016 near Del Norte, CO


Current Trail Conditions

All Clear 11 days ago
Add Your Check-In


Jun 3, 2024
Sean McKeown
Surprisingly great fun. Felt a little like the upper bits of Navajo Rocks in Moab. Worth the time.
Jul 23, 2023
Dried Figs
13mi — 3h 00m
Oct 15, 2022
Kona Pusher
May 28, 2022
Dan 60D5H411
With Owen, Eliana, Tina
Jul 5, 2021
David Death
Oct 15, 2020
Larry Collins
Trails are VERY well marked. Great place to ride amongst the rocks - fun! I'll definitely do this area again. 9mi — 1h 30m
Jul 25, 2020
Kendall Beggs
Pretty fun trail, the first couple of miles had great views. Some of it was a bit too technical for me. 10.2mi — 1h 45m
May 21, 2020
Rob Ware

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