22.5 miles
Distance
1,627 ft
Climb
-1,628 ft
Descent
1 mile
High Point
Links Dirty Bismark with Springbrook and trails west of 93. Many different lots to start from other than the Marshall Mesa parking lot... Or ride from South Boulder, Louisville, or Superior.
Detailed Description
Dirty South is a 22 mile popular easy route located near Boulder Colorado. This mountain bike only route can be used both directions and has a moderate overall physical rating. This route includes 24 trails. This route climbs 1,627 ft with a max elevation of 6,241 ft then descends -1,628 ft.
Local Trail Association
Boulder Mountainbike Alliance (bouldermountainbike.org)Please consider joining or donating to the local riding association to support trail development & maintenance.
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Trail Products
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Boulder Area Trails AppPhone App
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Trails in Route
328 ft | |||||
1 mile | |||||
3 miles | |||||
3 miles | |||||
3 miles | |||||
3 miles | |||||
1,870 ft | |||||
614 ft | |||||
1,043 ft | |||||
2 miles | |||||
1 mile | |||||
1,421 ft | |||||
1 mile | |||||
1 mile | |||||
1,421 ft | |||||
3,724 ft | |||||
2 miles | |||||
3,238 ft |
Details
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Riding area
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Primary ActivityMountain Bike
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Difficulty ratingGreen
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Route TypeLoop
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eBike Allowed
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Bike typeXC
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DirectionBoth Directions
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Physical ratingModerate
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Ridelogs
More Stats for Dirty South mountain bike route
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Avg time2 hr 49 min
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Altitude min5,521 ft
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Altitude start5,568 ft
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Altitude end5,568 ft
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Grade-0%
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Grade max-30.6%
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Grade min31.7%
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Distance climb11 miles
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Distance down9 miles
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Distance flat3 miles
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3D
Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
Trail Flow (Ridden Direction)
Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Ridden
Trailforks scans ridelogs to determine the last time a trail was ridden.
- < 2 days
- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
Contribute Details
Colors indicate trail is missing specified detail.
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Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
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- popular
- less popular
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Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
- mountain biking recent
- mountain biking (>6 month)
- hiking (1 year)
- moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
- Downhill Ski
- Backcountry Ski
- Nordic Ski
- Snowmobile
Winter Trails
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A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
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Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
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Photos
Videos
Recent Trail Reports Along Route
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- By LucyJuice & contributors
- #11994 - 2,471 views