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South Sourdough (#835)

Difficult
 3.7 (27)

Sourdough Trail (South of Brainard Lake)


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Map Key

5.9

Miles

9.5

KM

Singletrack

10,274' 3,132 m

High

9,217' 2,809 m

Low

1,121' 342 m

Up

265' 81 m

Down

4%

Avg Grade (3°)

20%

Max Grade (12°)

Dogs Unknown

E-Bikes Not Allowed

Features -none-

Description

From the Peak To Peak Highway, take the exit for the CU Alpine Research Center and park at the trailhead on the left. An outhouse is available at the parking lot.

The trail climbs up singletrack to the Brainard Lake road, which splits the southern and northern halves of the Sourdough Trail. The southern half of Sourdough is less technical than the northern half, and travels through splendid forest that rarely opens up enough for a vista.

This first two miles is a climb up fairly loose rocks and will keep you on your toes, though it's all rideable. The grade isn't too steep, but there's not much of a break until you get to a pretty bridge over a stream crossing at 2.5 miles.

The trail becomes smoother and faster at this point, but keeps climbing for a while with occasional views east through the trees. After about 3.5 miles, the trail becomes flatter and much faster to the end.

To return to the trailhead, either ride back on the trail or along the Peak To Peak Highway.

The trail is typically rideable (or mostly rideable) by the first week of June. Any sooner than that and you'll quite possibly be pushing through snow.

Contacts

Shared By:

Alan Doak with improvements by Richard Hackett

Trail Ratings

  3.7 from 27 votes

#1

in Nederland

#1507

Overall
  3.7 from 27 votes
5 Star
22%
4 Star
33%
3 Star
33%
2 Star
11%
1 Star
0%
Trail Rankings

#1

in Nederland

#262

in Colorado

#1,507

Overall
227 Views Last Month
8,342 Since May 2, 2013
Difficult

0%
0%
21%
4%
75%
0%

Photos

Winter means fresh tracks on the climb from Rainbow Lakes along South Sourdough.
Feb 18, 2017 near Nederland, CO
Peace Bridge in February has 3+ feet of snow!
Feb 23, 2017 near Nederland, CO
Bridge crossing and a good rest on the Sourdough Trail
Oct 15, 2014 near Nederland, CO
One of the few peeks through the trees.
Oct 15, 2014 near Nederland, CO

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Weather


Current Trail Conditions

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All Clear 22 days ago See History
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Check-Ins

Aug 19, 2019
Jon Banks
A bit chunky but fun. Bikepacked from Ward to Ned
Jul 11, 2019
Paul Billings
Feb 10, 2019
s Pk
out & back climb 5.2mi
Sep 9, 2018
Austin West
11.6mi
Aug 4, 2018
dave van tol
Aug 4, 2018
burnindaylight Davis
Aug 3, 2018
dave van tol
May 26, 2018
Sam W
About a mile past the "Memorial Peace Bridge" the trail has too many patches of soft, rotten snow to finish. Maybe in two or three weeks. 9mi — 1h 40m