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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.
  • > 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
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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
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x Missing Trails
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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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      CBJ mountain bike park with two new trails built in 2023, adding to the existing Paydirt, BTV, and Sidewinder trails. Plans for building two more trails in the future.

      Thanks to Brian Stoody for pioneering the area, and Collin WG for doing a lot of work on the trails over the years. And thanks to Michele Elfers with Parks and Rec for working with JMBA to develop the bike park and new trails.
      Primary Trail Type: All-Mountain & Downhill
      Land Status: City Managed
      Land Manager: CBJ Parks and Recreation
      Jennifer Drive Parking - Under Thunder zone google parking directions
      Access Info:
      Thunder Mountain alluvial fan zone in Mendenhall Valley. Access from Jennifer Drive trailhead.
      Activities Click to view
      Region Details
      • 9
      • 1
      • 2

      Region Status
      Caution as of Jun 12, 2024
      Local Trail Association

      Stats

      Avg Trail Rating
      Trails (view details)
      12
      Trails Mountain Bike
      12
      Trails E-Bike
      12
      Trails Hike
      8
      Trails Trail Running
      8
      Total Distance
      3 miles
      Total Descent Distance
      2 miles
      Total Descent
      565 ft
      Total Vertical
      153 ft
      Highest Trailhead
      208 ft
      Reports
      52
      Photos
      108
      Ridden Counter
      121

      Recent Ride Log Activity in Region

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

      Photos of Thunder Mountain Bike Park Mountain Bike

      46 |
      May 13, 2023 @ 1:39pm
      May 13, 2023
      26 |
      Aug 11, 2022 @ 3:31pm
      Aug 11, 2022
      18 |
      Aug 11, 2022 @ 3:31pm
      Aug 11, 2022
      trail: Paydirt
      42 |
      Aug 11, 2022 @ 3:31pm
      Aug 11, 2022
      trail: Paydirt
      34 |
      Aug 9, 2022 @ 8:42pm
      Aug 9, 2022
      trail: Paydirt
      38 |
      Aug 9, 2022 @ 8:39pm
      Aug 9, 2022
      trail: Paydirt
      48 |
      Jul 12, 2022 @ 9:37pm
      Jul 12, 2022
      trail: Paydirt
      49 |
      Jul 6, 2022 @ 7:17pm
      Jul 6, 2022

      Videos of Thunder Mountain Bike Park Mountain Bike

      Murph hits Ben :D Friday Fails Submission
      trail: BTV
      0:10 | 384 | Jun 16, 2020

      Recent Trail Reports

      statustraildateconditioninfouser
      Thunder Mt Uptrack 2
      Jun 12, 2024 @ 10:40am
      Jun 12, 2024
      Idealjoshinak
      Dream Zone
      Jun 12, 2024 @ 10:40am
      Jun 12, 2024
      Idealjoshinak
      BTV
      Dec 28, 2023 @ 2:51pm
      Dec 28, 2023
      Snow PackedTrail Running Large tree fallen over second to last...jmilz
      New Intermediate Jump Trail
      Dec 28, 2023 @ 2:44pm
      Dec 28, 2023
      Snow CoveredTrail Running Two fallen trees at bottom of trail, one...jmilz
      Thunder Mt Uptrack
      Dec 28, 2023 @ 2:00pm
      Dec 28, 2023
      Snow CoveredTrail Running Two fallen trees on service road.jmilz
      Paydirt
      Jun 18, 2023 @ 7:29am
      Jun 18, 2023
      Dry Thanks to Brian and several volunteer...trail-troll

      Activity Feed

      usernameactiontypetitledate
      joshinakaddreportactivity #54052329 and 1 more
      Jun 12, 2024 @ 8:10pm
      Jun 12, 2024
      joshinakwishlisttrailactivity #53466216
      Jun 1, 2024 @ 2:13pm
      Jun 1, 2024
      joshinakaddreportactivity #53351999 and 1 more
      May 29, 2024 @ 5:37pm
      May 29, 2024
      fqB0Mfriddentrailactivity #53265399 and 2 more
      May 27, 2024 @ 8:52pm
      May 27, 2024
      smack3287riddentrailactivity #52704124
      May 16, 2024 @ 6:14pm
      May 16, 2024

      Recent Comments

      usernametypetitlecommentdate
      JK907trailPlanned New Blue TrailTrail being developed, completion expected in...
      Oct 19, 2022 @ 10:05am
      Oct 19, 2022
      trail-trolltrailPlanned New Blue TrailNew trail nothing rideable yet…
      Aug 9, 2022 @ 3:49pm
      Aug 9, 2022
      trail-trolltrailBTVRepaired Rollers on BTV
      Jul 3, 2022 @ 7:25pm
      Jul 3, 2022
      trail-trolltrailPaydirtNew Rollers at the bottom of Paydirt!
      Jul 3, 2022 @ 7:21pm
      Jul 3, 2022
      trail-trolltrailPaydirtAKA: Poopshoot Trail
      Jun 22, 2022 @ 11:14pm
      Jun 22, 2022

      Nearby Areas

      namedistance
      Dredge Lakes 10 241.5 km
      West Glacier 6 22.9 km
      Ít'ji Shaánaxh, Silverbow Basin 2 3 18.5 km
      Eaglecrest Ski Area 3 3 28.5 km
      Douglas Island 1 3 39 km

      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike123 miles564 ft2 miles154 ft
      #6,595#2,8231065281
      E-Bike123 miles564 ft2 miles154 ft
      #2,812#65722
      Hike81 mile177 ft2,959 ft128 ft
      #4,931#2,381401
      Trail Running81 mile177 ft2,959 ft128 ft
      #4,937#2,3832424
      • By Bstoody & contributors
      • Admins: JMBA, JMBA
      • #32405 - 3,975 views
      • thunder mountain bike park activity log | embed map of Thunder Mountain Bike Park mountain bike trails | thunder mountain bike park mountain biking points of interest

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