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blueBlack Round Mountain Loop

  4.1 ( 14 ) Favorite


10.8 mile 17.4 kilometer loop
75% Singletrack


Ascent: 2,088' 636 m
Descent: -2,090' -637 m
High: 3,230' 985 m
Low: 1,693' 516 m


Avg Grade: 7% (4°)
Max Grade: 33% (18°)


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Trail shared by Paul Rogers

A local favorite, this ride has sweet, tight trail with an easy dirt road up from Purdon Crossing.

Paul Rogers

E-Bikes Unknown

Features -none-

There can, on a rare occasion, be snow. Or too much rainfall. Allow 48 hours after rains as this is the red clay dirt that gets easily scarred by knobby tires.


I call this "Big Little Loop". It is only 10 miles, but packs in some elevation and feels bigger. The singletrack makes it so worth it! The climb out is at the end, but it's easy and 1/3 concrete.
This is one of the more remote trails in the area, and it's worth the small drive outside of town.

There is a Lookout on Round Mountain that is quite spectacular on clear days. It's just a hop and skip to it from the loop. At about mile 2.4 there is a turnout with a trailhead sign, detour from here to the lookout and then cut back to the trail.

Yuba River offers several swimming holes and mellow vibes at and before Purdon Crossing. look for offshoot trails along South Yuba Trail: Edwards Crossing to Purdon Crossing. Which also gives you the option of going up and back for more trail time.

Need to Know

Parking; At Purdon Rd and Rector, take the dirt road up maybe 100ft. there is parking turnouts. Ticks, Mosquitos and poison oak, not necessarily in that order...


Start your ride with a mellow climb on a nice narrow, hard-packed trail. You'll experience a few ups and downs as the trail meanders up Round Mt. Slowly, the trail becomes a little tighter, a little steeper, a little bit more technical, and super fun.

From the top of Round Mountain Trail, you'll descend to the river. This section of trail has steep drop-offs and plenty of speed, so keep it tight. The margin for error is quite small here!

Once down to the South Yuba Trail: Edwards Crossing to Purdon Crossing, take a left. The trail now meanders up and down, in and out on sweet singletrack. Eventually, you'll pop out at Purdons crossing and start the dirt ride up.

An alternative option is to park at Purdon and do the climb first.

History & Background

BONC built, Rider approved...


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Apr 13, 2019
Ed L
10.8mi — 12h 04m
Mar 29, 2019
Lester Robancho
Oct 10, 2018
Matthew Machu
This trail has a few unmarked forks that can make it essential to carry gps. A few trees down. Great dirt, Steep, fast, and fun. Don't fall! 13mi
Aug 31, 2018
Chris F
Apr 28, 2018
Logan Langenhuizen
Got a little off track coming down to the river as it was marked off with caution tape for a race on Sunday. Otherwise a solid and fun trail. 12.6mi
Jan 2, 2018
Jeff Angermann 1
11mi — 1h 10m
Aug 30, 2017
Charnley Slack
There is unavoidable poison oak so if you're allergic keep that in mind. The trail was a little hard to spot from the start so I went up a little d... 13.3mi
Jun 17, 2017
Larry Russell

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Trail Ratings

  4.1 from 14 votes


  4.1 from 14 votes
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in California


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