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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
Max Vehicle Width
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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.
Trails Deemphasized
Trails are shown in grey.
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      No description for Altadena has been added yet! Login or register to submit one.
      Activities Click to view
      Region Details
      • 13
      • 6
      • 23
      • 28
      • 3

      Region Status
      Caution as of Nov 25, 2023

      Stats

      Avg Trail Rating
      Trails (view details)
      75
      Trails Mountain Bike
      73
      Trails E-Bike
      2
      Trails Horse
      13
      Trails Hike
      76
      Trails Trail Running
      76
      Total Distance
      179 miles
      Total Descent
      56,659 ft
      Total Vertical
      5,386 ft
      Highest Trailhead
      6,421 ft
      Reports
      821
      Photos
      675
      Ridden Counter
      11,016
      Sub Regions

      Photos of Altadena Mountain Bike

      10 |
      Oct 11, 2023 @ 6:34pm
      Oct 11, 2023
      13 |
      Sep 16, 2023 @ 2:24pm
      Sep 16, 2023
      | 1 comments
      11 |
      Sep 16, 2023 @ 2:24pm
      Sep 16, 2023
      | 1 comments
      9 |
      Sep 16, 2023 @ 2:24pm
      Sep 16, 2023
      169 |
      Mar 25, 2018 @ 2:24pm
      Mar 25, 2018
      477 |
      Apr 18, 2016 @ 10:21am
      Apr 18, 2016
      trail: Ken Burton
      415 |
      Apr 18, 2016 @ 10:21am
      Apr 18, 2016
      trail: Ken Burton
      390 |
      Apr 18, 2016 @ 10:20am
      Apr 18, 2016

      Videos of Altadena Mountain Bike

      Night Ride Disaster
      0:25 | 137 | Jul 31, 2020
      San Gabes
      3:22 | 62 | Sep 15, 2019
      dusty crash onto face
      0:48 | 201 | Jul 10, 2019
      Couldn't hang on
      0:48 | | Jul 9, 2019
      lower sunset
      4:04 | 110 | Mar 28, 2019
      millard
      1:57 | 117 | Mar 22, 2019
      fern
      2:18 | 312 | Mar 16, 2019
      crash
      0:55 | 144 | Mar 16, 2019

      Recent Trail Reports

      statustraildateconditioninfouser
      Ken Burton
      Nov 25, 2023 @ 11:12am
      Nov 25, 2023
      DryAlmost completely brushed couple weekends...eianprohl
      El Prieto Trail
      Nov 24, 2023 @ 7:04pm
      Nov 24, 2023
      IdealBuff!!!!dantepetri1
      Lower Sunset Ridge
      Nov 24, 2023 @ 7:03pm
      Nov 24, 2023
      IdealBuffdantepetri1
      Brown Mountain Road
      Nov 21, 2023 @ 1:50pm
      Nov 21, 2023
      Idealhero dirt! get some!HDM94
      Fern Truck Trail
      Nov 21, 2023 @ 1:50pm
      Nov 21, 2023
      Idealhero dirt! get some!HDM94
      Pacifico Summit Spur Road
      Oct 15, 2023 @ 2:31am
      Oct 15, 2023
      VariableGregsilli
      Nature's Canteen
      Oct 7, 2023 @ 4:10pm
      Oct 7, 2023
      DryVery overgrown. If you ride this in...Namlak
      Lower Gabrielino Trail
      Sep 21, 2023 @ 8:52pm
      Sep 21, 2023
      VariableThe trail is mostly fixed now. There are...cranklin
      Santa Clara Divide Road (Alder Saddle to Three Points)
      Sep 18, 2023 @ 1:53am
      Sep 18, 2023
      DryFrankboboutside
      El Prieto Road
      Sep 17, 2023 @ 4:02pm
      Sep 17, 2023
      DryIt's definitely been trimmed about 1/2...kb6ooc

      Activity Feed

      usernameactiontypetitledate
      lolovelocommenttrailNature's Canteen
      Nov 26, 2023 @ 2:48pm
      3 days
      lolovelocommentrouteStrawberry Peak
      Nov 26, 2023 @ 2:46pm
      3 days
      eianprohladdreportKen Burton
      Nov 25, 2023 @ 11:12am
      Nov 25, 2023
      Hansk49O7XcommenttrailKen Burton
      Nov 25, 2023 @ 6:48am
      Nov 25, 2023
      kusalzmannwishlisttrailFern Truck Trail and 2 more
      Nov 25, 2023 @ 6:18am
      Nov 25, 2023

      Recent Comments

      usernametypetitlecommentdate
      lolovelotrailNature's CanteenOvergrown
      Nov 26, 2023 @ 2:48pm
      3 days
      Hansk49O7XtrailKen BurtonThe MWBA had a big workday recently as well as...
      Nov 25, 2023 @ 6:48am
      Nov 25, 2023
      ucsdbrianreportBrown Mountain RoadDamn spell check. "All flowy and nice"...
      Nov 19, 2023 @ 5:22pm
      Nov 19, 2023
      BenKoetrailEl Prieto TrailReally fun trail! My first time riding it and...
      Nov 9, 2023 @ 7:26pm
      Nov 9, 2023
      BenKoetrailFern Truck TrailPretty steady, smooth, but grueling climb up....
      Nov 9, 2023 @ 7:22pm
      Nov 9, 2023

      Local Badges


      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike73162 miles53,041 ft72 miles5,387 ft
      #828#4566768212321,345
      E-Bike23 miles36 ft1,818 ft846 ft
      25691,303
      Horse1355 miles12,831 ft25 miles5,121 ft
      2512
      Hike76179 miles56,660 ft81 miles5,387 ft
      #633#396182011,104
      Trail Running76179 miles56,660 ft81 miles5,387 ft
      #638#3978201208
      • By BlazeNawaY & contributors
      • Admins: CORBA, MWBA, LRCC
      • #9518 - 8,137 views

      Downloading of trail gps tracks in kml & gpx formats is enabled for Altadena.
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