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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail 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%
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
inches

Radar Time
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
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 Big Rock / Lucas Valley has been added yet! Login or register to submit one.
      Activities Click to view
      Region Details
      • 11
      • 4
      • 6
      • 5
      • 1

      Region Status
      Caution as of Oct 6, 2021
      Local Trail Association

      Stats

      Avg Trail Rating
      Trails (view details)
      27
      Trails Mountain Bike
      27
      Trails Hike
      27
      Trails Trail Running
      27
      Total Distance
      42 miles
      Total Descent
      18,603 ft
      Total Vertical
      1,759 ft
      Highest Trailhead
      1,870 ft
      Reports
      131
      Photos
      127
      Ridden Counter
      2,034

      Photos of Big Rock / Lucas Valley Mountain Bike

      17 |
      Jul 21, 2021 @ 8:54pm
      Jul 21, 2021
      9 |
      Jul 21, 2021 @ 8:54pm
      Jul 21, 2021
      17 |
      Jul 21, 2021 @ 8:54pm
      Jul 21, 2021
      13 |
      Jul 10, 2021 @ 4:52pm
      Jul 10, 2021
      20 |
      Jul 10, 2021 @ 4:52pm
      Jul 10, 2021
      14 |
      Jul 10, 2021 @ 4:52pm
      Jul 10, 2021
      17 |
      Jul 10, 2021 @ 4:51pm
      Jul 10, 2021
      16 |
      Jul 10, 2021 @ 4:50pm
      Jul 10, 2021

      Videos of Big Rock / Lucas Valley Mountain Bike

      Big Rock
      0:09 | 182 | Sep 27, 2017
      BRAKE FADE!!!!!!!!!!!!
      trail: Rotor Burn
      2:17 | 133 | Jul 14, 2016
      680 to Solstice
      trail: 680
      8:41 | 777 | Jan 21, 2013
      Luiz Fire Road dirt/gravel road trail located...
      8:42 | 7 | Aug 27, 2021 , San Rafael
      680 Trail - Top Down
      trail: 680
      20:33 | 467 | Jan 1, 2019 , San Rafael
      Goat Trail
      trail: Goat Trail
      6:48 | 948 | Oct 19, 2018 , San Rafael
      E committer will not work for this trail.
      18:00 | 11 | Aug 28, 2021 , San Rafael

      Recent Trail Reports

      Activity Feed

      usernameactiontypetitledate
      user #2090606shshoupaddkarmaBig Rock / Lucas Valley
      Oct 14, 2021 @ 7:25pm
      Oct 14, 2021
      user #1902053psheehyaddreportBig Rock Trail
      Oct 6, 2021 @ 1:07pm
      Oct 6, 2021
      user #2280974misterjohn123wishlisttrailGoat Trail
      Sep 29, 2021 @ 9:37am
      Sep 29, 2021
      user #2681631windwagonwishlisttrailGoat Trail
      Sep 25, 2021 @ 5:13pm
      Sep 25, 2021
      user #2491684jakespeakman88difficultyvotetrailGoat Trail
      Sep 20, 2021 @ 8:47pm
      Sep 20, 2021

      Recent Comments

      usernametypetitlecommentdate
      user #2236588mjlee2003trailRotor BurnPretty fun trail, can really get some serious...
      Sep 29, 2021 @ 12:18pm
      Sep 29, 2021
      user #2236588mjlee2003trailRotor BurnPretty fun trail, can really get some serious...
      Sep 29, 2021 @ 12:18pm
      Sep 29, 2021
      user #1338388superhorsetrailLuiz Fire RoadIts true. even go down feel the steep.
      Aug 27, 2021 @ 11:18pm
      Aug 27, 2021
      user #1067893getinsideways415trailBig Rock TrailDescription says it all. I wouldn’t say this...
      Jul 10, 2021 @ 4:48pm
      Jul 10, 2021
      user #1067893getinsideways415trailGoat TrailDo not come up Luis Fire Road to hit this...
      Jul 5, 2021 @ 6:17pm
      Jul 5, 2021

      Nearby Areas

      namedistance
      Big Rock / Novato 12.5 km
      Tamarancho / West Marin / North Tam 12 37 29 13.1 km
      Gold Hill4.9 km
      garin5.2 km
      China Camp 4 14 95.9 km

      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike2742 miles18,602 ft26 miles1,759 ft
      #5,648#2,4341271314,532
      Hike2742 miles18,602 ft26 miles1,759 ft
      #4,856#2,286131269
      Trail Running2742 miles18,602 ft26 miles1,759 ft
      #4,860#2,28413132
      • By brenthillier NSMBA TRAILFORKS & contributors
      • Admins: A4B, MCBC
      • #3979 - 6,680 views
      • big rock / lucas valley activity log | embed map of Big Rock / Lucas Valley mountain bike trails | big rock / lucas valley mountain biking points of interest
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