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Oat Hill Mine Trail



16.6 mile 26.8 kilometer out and back
55% Singletrack


Ascent: 2,678' 816 m
Descent: -2,677' -816 m
High: 2,501' 762 m
Low: 398' 121 m


Avg Grade: 6% (3°)
Max Grade: 20% (11°)


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Trail shared by Brian Kennedy

Possibly the best out and back you'll ever ride!

Brian Kennedy

Electric Mountain Bikes Unknown

Features -none-


Oat Hill Mine Road rises steadily above Calistoga and takes you through some great scenery and challenging terrain. You can turn around once you get to the top (around 4.5 miles in) and head back down, or continue on and explore even more of the land towards Aetna Springs.

Need to Know

Trail holds up nicely during the wet months of winter.

There can be a lot of hikers during the first/last couple miles, stay in complete control.


This ride has a ton of technical fun on the way up and down. The first few miles of the climb are pretty gradual and well graded. Near the top you'll find unrelenting chunk that will work you over hard.

Although I have marked this ride as 55% singletrack, the quality of the trail is great from top to bottom. The trail is quite rough most of the ride but that does not detract from the difficulty or fun factor.

History & Background

From the Oat Hill Mine Trail brochure: With the discovery of cinnabar deposits in the late 1800s Napa County saw the development of several mines to extract the ore and produce quicksilver (mercury). The most productive of several mines in the area was the Oat Hill Mine which accounted for one third of the total U.S. production of quicksilver from its discovery in 1872 until the late 1960s. The mine was idle from 1923 to 1927 when it reopened and operated continuously through 1944. After the Second World War mining profits fell, and mining ceased in the late 1960s.

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Biked this trail?

We need help with the following missing trail information:

Family Friendly, ADA Accessible, Features, Electic Mountain Bikes Allowed


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Apr 19, 2020
Dan Brink
This ride never disappoints. Technical portions rival the best Tahoe has to offer and the scenery is hard to beat. 16.6mi
Jul 6, 2019
DnC Twohig
16.6mi — 4h 00m
Jun 15, 2019
Kevin Doiron
Apr 28, 2019
Eric Benisek
Such a good ride. Climb starts easy but get super technical from mile 3 to 4.5. Very much like Hymasa in Moab. Great winter trail too! 15mi — 2h 30m
Apr 26, 2019
Ryan White
9mi — 1h 45m
Mar 24, 2019
Anthony Dodero
9.3mi — 2h 10m
Mar 1, 2019
Luis Aponte
Jan 22, 2019
Joshua Bibbee

Trail Ratings

  4.5 from 42 votes


  4.5 from 42 votes
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Ride Rankings


in California


258 Views Last Month
20,642 Since Jul 27, 2013



Great views before the gnarly sections.
Apr 30, 2017 near Calistoga, CA
There's great rain riding to be had on the Oat Hill Mine Trail.
Dec 17, 2016 near Calistoga, CA
Traction is awesome on the Oat Hill Mine Trail, even during a rainstorm.
Dec 17, 2016 near Calistoga, CA
On the way down Oat Hill Mine Road
Jul 27, 2013 near Calistoga, CA
The first look at the amazing Palisades with a touch of wild flower blooms.
Apr 30, 2017 near Calistoga, CA
This is one of those moments you just have to stop and capture on your ride.
Dec 17, 2016 near Calistoga, CA

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