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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Inadequate
  • 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.
  • > 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.
  • Description
  • Photos
  • Description & Photos
  • Videos
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.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
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Radar Time
x 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
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
x 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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      This area span the the iconic Flatirons open space area with hiking trails to the tops of South Boulder Peak, Bear Peak, Green Mountain, Flagstaff and Mount Sanitas. For less strenuous climbing, check out the Mesa trail and NCAR and Chautauqua trail heads for mellow loops through meadows and trees.
      Fee Parking google parking directions
      Activities Click to view
      Region Details
      • 1
      • 1

      Region Status
      Caution as of Aug 28, 2022

      Stats

      Avg Trail Rating
      Trails (view details)
      106
      Trails Mountain Bike
      2
      Trails E-Bike
      1
      Trails Horse
      60
      Trails Hike
      111
      Trails Trail Running
      111
      Trails Snowshoe
      1
      Total Distance
      70 miles
      Total Descent
      17,467 ft
      Total Vertical
      3,202 ft
      Highest Trailhead
      8,476 ft
      Reports
      655
      Photos
      46
      Ridden Counter
      12,665

      Popular Boulder Open Space Mountain Biking Trails

      statustitledifficultyrating
      Chapman Drive
      Tenderfoot Trail

      Recent Ride Log Activity in Region

      Today
      • 0 rides
      Yesterday
      • 5 rides
      Past Week
      • 44 rides

      Photos of Boulder Open Space Mountain Bike

      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      1 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      2 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023
      3 |
      Jun 30, 2023 @ 10:26am
      Jun 30, 2023

      Videos of Boulder Open Space Mountain Bike

      Ute trail,Lower pikes peak area,near Manitou...
      trail: Ute
      2:23 | 54 | Dec 31, 2015
      Ute Valley Dec 2014
      trail: Ute
      0:18 | 103 | Dec 8, 2014
      Ute Valley
      trail: Ute
      1:20 | 301 | Nov 25, 2014
      Angel Fire MSC Race weekend
      trail: Viewpoint
      2:47 | 249 | Jun 14, 2012

      Recent Trail Reports

      statustraildateconditioninfouser
      Boulder Canyon Trail Fourmile Connection
      Sep 21, 2023 @ 8:42am
      Sep 21, 2023
      Very DryVery dry conditions.jvfish1 Birkie
      Chapman Drive
      Aug 1, 2023 @ 2:50am
      Aug 1, 2023
      DryRain rutted, just be careful coming down...jvfish1 Birkie
      Parking Connector
      Apr 8, 2023 @ 9:53pm
      Apr 8, 2023
      DryHike giniek27
      Parking Connector
      Aug 16, 2022 @ 9:08am
      Aug 16, 2022
      WetHike 1Hunter-R Map Team

      Activity Feed

      usernameactiontypetitledate
      jvfish1addreportBoulder Canyon Trail Fourmile Connection
      Sep 25, 2023 @ 12:39pm
      21 hours
      RbusfieldwishlisttrailChapman Drive
      Sep 16, 2023 @ 9:40pm
      Sep 16, 2023
      rhanstuedleaddreportChautauqua
      Aug 30, 2023 @ 6:10am
      Aug 30, 2023
      willerulesvotetrailBoulder Canyon Trail Fourmile Connection
      Aug 23, 2023 @ 10:27am
      Aug 23, 2023
      rhanstuedleaddreportChautauqua
      Aug 14, 2023 @ 11:20am
      Aug 14, 2023

      Nearby Areas

      namedistance
      The People's Crossing Park2.7 km
      CU South Campus 5 13.1 km
      Walker Ranch 1 13.2 km
      Betasso Preserve 4 14 km
      Valmont Bike Park 7 8 24.7 km

      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike23 miles16 ft446 ft955 ft
      #2,943#1,5016414,871
      E-Bike1
      51623
      Horse6043 miles10,240 ft21 miles2,851 ft
      #1,3581381
      Hike11170 miles17,467 ft31 miles3,202 ft
      #2,332#1,3614665493,726
      Trail Running11170 miles17,467 ft31 miles3,202 ft
      #2,336#1,35865493,119
      Snowshoe1899 ft43 ft
      72
      • By canadaka Trailforks & contributors
      • Admins: WendyBMA, BMA, darmabum, getvert, mpopetz, Pumpntrail, Iowegian
      • #28281 - 2,928 views
      • boulder open space activity log | embed map of Boulder Open Space mountain bike trails | boulder open space mountain biking points of interest

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