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Oat Hill Mine Trail

 4.4 (35)
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Map Key

16.6 Miles 26.8 Kilometers



2,678' 816 m


-2,677' -816 m



Avg Grade (3°)


Max Grade (11°)

2,501' 762 m


398' 121 m


Shared By Brian Kennedy



Getting forecast...

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

Brian Kennedy

Dogs Leashed

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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Your Check-Ins


Mar 24, 2019
Anthony Dodero
9.3mi — 2h 10m
Mar 1, 2019
Luis Aponte
Jan 22, 2019
Joshua Bibbee
Sep 18, 2018
Sam Levy
Feb 18, 2018
James Bishop
Connected from Table Rock Trail 11.6mi
Feb 3, 2018
Brian Strauss
Trail is in great shape. I just did the out and back to the 4.5mile-ish mark where you get to the top. Supreme views. 9mi
Jan 21, 2018
Chris Miksovsky
Long, technical rocky climb up. Some tricky section. Nice views. A blast going back down. 16.5mi — 2h 30m
Nov 11, 2017
Andre Giard
Mostly dry, but VERY technical. Tough to muscle your way through Mile 4 to 5 16.2mi — 3h 00m

Trail Ratings

  4.4 from 35 votes


  4.4 from 35 votes
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in California


398 Views Last Month
17,877 Since Jul 27, 2013
Difficult Difficult

Jeff Correll
American Canyon, CA
Jeff Correll   American Canyon, CA
This trail is in Calistoga, not Santa Rosa. Jun 23, 2017
Chris Miksovsky
San Francisco, CA
Chris Miksovsky   San Francisco, CA
All clear as of January, 2018. It's 16.5mi roundtrip, per my GPS. Things get hairy between 3.5 Jan 22, 2018
Chris Miksovsky
San Francisco, CA
Chris Miksovsky   San Francisco, CA
All clear as of January, 2018. It's 16.5mi roundtrip, per GPS. Took me about 2.5hours total. Going up, things get hairy between 3.5~4 miles with quite a few technical rock climbs. None seem impossible, although there are some big step-ups, and some of the technical bits come one after the other, making it harder. I was also there on a wet day so the rocks were a bit slick. If you can clean all of this going up you've got mad skills. I dabbed and had to regroup a few times. There are some nice views and no crazy exposure. Towards the end there are some short bits that are on bare rock, almost Moab slickrock-like. Going back down is fun and much faster. Careful though - hikers here too. All in all, a pretty cool ride. If you love technical rocky stuff, you'll enjoy it. Jan 22, 2018

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