12.0 miles
Distance
2,623 ft
Climb
-2,622 ft
Descent
2 miles
High Point
1 ft
Altitude change
7,148 ft
Altitude min
7,943 ft
Altitude start
7,943 ft
Altitude end
-43%
Grade max
42.1%
Grade min
6 miles
Distance climb
6 miles
Distance down
2,310 ft
Distance flat

No description for Thunder Mountain Loop route has been added yet! Submit one here.

Detailed Description
Thunder Mountain Loop is a 12 mile moderately popular intermediate route located near Carson Spur California. This hike only route and has a moderate overall physical rating. This route includes 7 trails. This route climbs 2,623 ft with a max elevation of 9,382 ft then descends -2,622 ft.
Local Trail Association
Please consider joining or donating to the local riding association to support trail development & maintenance.
Donate to earn trail karma!

Stats

  • Distance
    12 miles
  • Avg time
    11 hr 14 min
  • Altitude min
    7,148 ft
  • Altitude start
    7,943 ft
  • Altitude end
    7,943 ft
  • Climb
    2,623 ft
  • Descent
    -2,622 ft
  • Grade max
    -43%
  • Grade min
    42.1%
  • Distance climb
    6 miles
  • Distance down
    6 miles
  • Distance flat
    2,310 ft

9 Reviews & Comments


We hope you've been enjoying Trailforks!

Create a FREE account to view route comments and much more.

Create a Free Account

Trails in Route

Details

  • Riding area
    Carson Spur
  • Primary Activity
    Hike
  • Difficulty rating
    Blue
  • Route Type
    Loop
  • Physical rating
    Moderate
no votes yet
close
  • Basemap  Map 
    • Pro
    • Pro
    • Pro
    • Pro
    • Pro
    • Pro
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.
  • > 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
inches
US Cell Coverage
Legend
cell carrier legend

Radar Time
Activity Recordings
Trailforks uses anonymized public activity data. ?
Activity Recordings
Trailforks uses anonymized public activity data. ?
Personal Heatmap
▶ Activity Types
all / none
▶ Options
2
Date range month
–
Winter Trails
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
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.
BC Backroad Status

Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.

map legend
Slope Aspect
Direction the slope faces
Flat N NE E SE S SW W NW
Trails Deemphasized
Trails are shown in grey.
disable
Only show trails with no bike usage.
Enable
Suggested Layers
Based on selected activity type

    Save the current map location and zoom level as your default home location whenever this page is loaded.

    Save
    Trail transparency
    view larger map
    • Singletrack

    Photos

    more photos »
    96
    131
    148
    148

    Videos

    more videos »
    youtuber Thunder Mtn / Kirkwood, CA / MTB
    Thunder Mtn / Kirkwood, CA / MTB
    13:07 | 128 | comments: 0 | favs:
    Jul 19, 2025
    youtuber Thunder Mtn / Kirkwood, CA / MTB
    Thunder Mtn / Kirkwood, CA / MTB
    13:07 | 73 | comments: 0 | favs:
    Jul 19, 2025

    Recent Trail Reports Along Route

    statustraildateconditiondescription
    Thunder Mountain Loop (South)
    Jul 15, 2026 @ 9:42am (America/Los_Angeles)
    Jul 15, 2026
    		Sweet dirt after recent rain
    Horse Canyon Trail - Lower
    Jul 15, 2026 @ 9:42am (America/Los_Angeles)
    Jul 15, 2026
    		Dirt doesn’t get much better
    Thunder Mountain Summit
    Mar 28, 2026 @ 11:10am (America/Los_Angeles)
    Mar 28, 2026
    Thunder Mountain Loop (Horse Canyon/Martin Meadow Connector)
    Sep 25, 2025 @ 3:22pm (America/Los_Angeles)
    Sep 25, 2025
    		All down trees have been removed, the trail has been raked and improved in areas. Good to go!
    Castle Rock Trail
    Jul 28, 2025 @ 8:17pm
    Jul 28, 2025
    		Amador Trail Stewardship as well as the Forest Service came out and gave this trail some love. The trees have been cleared as well as some tread work, trail is much better now.
    more reports »

    Hit the Trail

    Open in App

    Get this route on your phone instantly.

    Download Route

    Save to wishlist, Garmin & download.