4.8
(3579)
6,153
riders
Sourdough and South Saint Vrain Loop
03:01
29.0km
700m
Mountain biking
The Sourdough and South Saint Vrain Loop offers a relentless technical mountain biking experience through high-altitude pine and aspen forests. You'll navigate a challenging 18.0-mile (29.0 km) route, gaining 2301 feet (701 metres) in elevation over approximately 3 hours. Expect a ride filled with rocks, roots, and demanding sections often…
Last updated: June 9, 2026
Tips
Includes a very steep uphill segment
You may need to push your bike.
After 1.09 km for 555 m
Waypoints
Start point
Parking
Get Directions
454 m
North Sourdough Trail
Highlight (Segment) • Trail
Tip by
29.0 km
End point
Parking
Way Types & Surfaces
Way Types
21.7 km
4.08 km
3.15 km
< 100 m
Surfaces
22.3 km
6.58 km
< 100 m
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Elevation
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Weather
Powered by Foreca
Today
Friday 10 July
22°C
10°C
43 %
Additional weather tips
Max wind speed: 13.0 km/h
to get more detailed weather forecasts along your route
This route was planned by komoot.
Frequently Asked Questions
Where can I park to access the Sourdough and South Saint Vrain Loop?
While specific parking details aren't provided, the trail is located near Nederland, Colorado. Riders typically access this area via trailheads that serve the Roosevelt National Forest. It's advisable to check local land management websites for designated parking areas and any specific regulations before your visit.
Is the Sourdough and South Saint Vrain Loop suitable for beginner mountain bikers?
No, this loop is considered a difficult to advanced mountain biking trail. It's often rated as a blue/black or black diamond due to its continuously rocky and technical singletrack, sustained climbing at altitude, and challenging descents. It's not a smooth, flowy trail and may require hike-a-bike sections for less experienced riders.
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
What kind of terrain can I expect on this mountain bike ride?
Expect a challenging and technical experience. The terrain is characterized by continuously rocky singletrack, numerous roots, and embedded rocks. You'll encounter
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