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This loop has it all... singletrack, rock gardens, flowy sections, difficult ascents, great views and decent distance.


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Map Key

18.8

Miles

30.3

KM

35%

Singletrack

6,103' 1,860 m

High

5,515' 1,681 m

Low

1,068' 325 m

Up

1,066' 325 m

Down

2%

Avg Grade (1°)

9%

Max Grade (5°)

Dogs Unknown

E-Bikes Not Allowed

Features Views

Overview

Awesome loop that will take you across all different types of terrain. I am a moderate rider and I find it to be heart pumping and also fun.

The Dirty Bismark is fun and this path adds a bit of a cool downhill section that leads to Walker Ranch, too. Five separate places to park and jump into this loop. There is even a bathroom roughly halfway through if you go the route I traced.

Need to Know

You can ride this on a gravel bike but probably more fun with fatter tires and better suspension. If this is your first attempt at riding, start elsewhere. Once you start this loop, turning back is less fun.

Description

Starting at the parking lot (has bathroom) you go up a nice little hill that gets the blood flowing and kicks you into your climbing gears. From there, you peacefully ride towards the mountains before dropping down a steep descent with minor roots and little jumps. A hairpin turn and you drop into the valley.

The valley ride has some rocks gardens and mostly mild terrain following a little creek/river until you get to Spring Brook Loop fork (up the trail is additional parking and a bathroom). Continue on to Community Ditch and you'll get to ride some fun, flowy downhill sections through mostly singletrack flat terrain. Take that to 66th Street and the trail crosses over to continue a decent ride east until you hit an uphill section including some switchbacks. Follow that up until you come to a long straight section that includes a large steep ascent that, to be frank, sucks if you're not prepared for it in the middle of this long ride.

Once you're past the hill, you face many smaller rock gardens and flowy singletrack along the mild climb and falls adjacent to Highway 128. A jagged rock garden and tricky little trail is at the finish line before you cross back over Highway 93 to complete the loop.

History & Background

A section of this trail used to be a race circuit I think (the Dirty Bismark sections).

Contacts

Shared By:

Kyle Simpson with improvements by Wendy Sweet

Trail Ratings

  4.0 from 28 votes

#841

Overall
  4.0 from 28 votes
5 Star
18%
4 Star
71%
3 Star
7%
2 Star
4%
1 Star
0%
Recommended Route Rankings

#197

in Colorado

#841

Overall
87 Views Last Month
5,596 Since Apr 20, 2021
Easy/Intermediate Easy/Intermediate

4%
68%
25%
4%
0%
0%

Photos

Beautiful evening light and views of the Flatirons and Continental Divide from the Marshall Mesa trail in South Boulder.
Nov 11, 2016 near Superior, CO
Dirty Bismarck heading towards the main parking lot.
Oct 18, 2015 near Superior, CO
Foothils sunset from the Community Ditch Trail
Apr 8, 2015 near Superior, CO
The intersection of Doudy Draw and the Spring Brook loops over looking the Boulder, CO flat irons.
Jun 24, 2016 near Superior, CO
South end of the route, looking west.
Jun 10, 2024 near Superior, CO
Fast trail with beautiful views of the front range from the Community Ditch trail.
Oct 30, 2015 near Superior, CO
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Weather


Current Trail Conditions

All Clear 59 days ago
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Check-Ins

Nov 24, 2024
Tyler Shady
Oct 15, 2024
Kenny S
Jun 11, 2024
sss S
May 17, 2024
Easton Schlender
Feb 2, 2024
jen kammerer
Jun 10, 2023
Brent O'Neill
17.8mi — 2h 02m
Jun 2, 2023
Nolan Green
May 29, 2023
Jake Molzen
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