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

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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.

Trail Issues on Route

  • Significant Issue / Amber: 1 trail (newest: Jul 5, 2026)
  • Minor Issue / Yellow: 1 trail (newest: Jul 5, 2026)

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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

10 Reviews & Comments


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Details

  • Riding area
  • Primary Activity
    Hike
  • Difficulty rating
    Blue
  • Route Type
    Loop
  • Physical rating
    Moderate
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Trail transparency
  • Singletrack

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
Castle Rock Trail
Jul 5, 2026 @ 11:34am (America/Los_Angeles)
Jul 5, 2026
Tons of downed trees, the ranger told us to go up the road a bit to connect in, as the start is totally unrideable. Probably need to wait a year before it is cleared.
Thunder Mountain Loop (Horse Canyon/Martin Meadow Connector)
Jul 5, 2026 @ 11:34am (America/Los_Angeles)
Jul 5, 2026
A couple downed trees to navigate around
Thunder Mountain Loop (Sentinels)
Jul 5, 2026 @ 11:34am (America/Los_Angeles)
Jul 5, 2026
Burl climbing in spots
more reports »

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