more stats
1.3 miles
Distance
126 ft
Climb
-1,036 ft
Descent
00:30:28
Avg time
-909 ft
Altitude change
1,584 ft
Altitude min
2,588 ft
Altitude max
2,493 ft
Altitude start
1,584 ft
Altitude end
-13.673%
Grade
-54.345%
Grade max
31.998%
Grade min
1,067 ft
Distance climb
1 mile
Distance down
192 ft
Distance flat
00:30:28
Avg time

Upper Colby Trail Details

  • Activities
    • Mountain Bike
    • Winter Fat Bike
    • Hike
    • Trail Running
  • Riding Area
    Los Angeles County
    California
  • Difficulty Rating
    Blue Rate
  • Voted Difficulty
    Black Diamond (4 votes)
  • Local Popularity
    60 in Mountain Biking [+]
    • 100 in Trail Running
    • 80 in Hiking
  • Global Ranking
    #98920 in Mountain Biking [+]
    • #16050 in Trail Running
    • #69482 in Hiking
  • Hiking SAC Scale
    T3 Demanding Mountain Hiking
  • Trail Type
    Singletrack
  • Bike Type
    DH, AM, XC, DJ, Fat
  • Direction
    Downhill Primary
    Popular Direction Shown
  • Climb Difficulty
    Black Diamond
  • Physical Rating
    Extreme
  • Trail Visibility
    Always easy to follow
  • Dogs Allowed
    Yes
  • TTFs on Trail
    Jump, Gap Jump

This trail runs along a ridge and has some nicely maintained jumps. HOWEVER, there are at least 3 extremely hard sections that are steep and highly eroded making any chance of braking impossible These sections are around 20% and were even hard to hike-a-bike downhill.nBe sure you've updated your AFLAAC policy if you choose to ride through those sections, cuz I'm not sure I'd even tackle them with my dual sport!

Trail Supporters

  • USFS
    Land Manager
Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 1 rides
  • 4.5 km avg distance
All
  • 10 rides
  • Last: Jan 19, 2026
c1c2c3c4
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Upper Colby Trail Trail Reports

statusdatedescription
Dec 12, 2025 @ 12:45pm (America/Los_Angeles)
Dec 12, 2025
 Major erosion (major ruts or slumping, large boulders and roots exposed due to erosion)
Sep 2, 2024 @ 1:54pm
Sep 2, 2024
 more of a double black with all the doubles and gaps on the trail, you can ride around all of them though. the first chute is extremely steep and...
Dec 1, 2023 @ 12:11pm
Dec 1, 2023
 Extremely dry and super loose, very rutted, lots of loose rocks everywhere to take u out.
Mar 30, 2021 @ 11:31am
Mar 30, 2021
 Despite the rain last week it's extremely dry and loose in most areas.
Feb 22, 2021 @ 9:50am
Feb 22, 2021
 Last rainstorm made the trail pretty dry and loose in the steeper parts. The last part near the road is really loose and super sketchy but is a...
more »
Status:
on Dec 12, 2025
Very Dry
Avg: 4.09 (4 votes)
Your vote: 0

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Trail Conditions
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  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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  • Both Directions
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  • Uphill Only
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        Directions to upper-colby-trail trailhead (34.173940, -117.851113)

        Photos

        4 more »
        92 |
        Dec 4, 2025 @ 11:35am
        Dec 4, 2025
        73 |
        Dec 4, 2025 @ 11:35am
        Dec 4, 2025
        36 |
        Dec 4, 2025 @ 11:35am
        Dec 4, 2025
        50 |
        Dec 1, 2023 @ 5:43pm
        Dec 1, 2023

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        3 Reviews & Comments


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        Frequently Asked Questions About Upper Colby Trail

        ▼ Where is Upper Colby Trail located?
        Upper Colby Trail is located in Los Angeles County, California, United States. It is part of the Los Angeles County trail network. The trailhead is located at coordinates 34.17394, -117.85111.
        ▼ How hard is Upper Colby Trail?
        Upper Colby Trail is rated as Blue difficulty. The physical rating is Extreme. The average grade is 13.673%. The climb difficulty is rated Black Diamond.
        ▼ What is the elevation gain for Upper Colby Trail?
        Upper Colby Trail has 126 ft of elevation gain. The trail has 1,036 ft of elevation descent. The elevation ranges from 1,584 ft to 2,588 ft.
        ▼ Is Upper Colby Trail a point to point trail?
        Upper Colby Trail is not a point to point trail. The direction is Downhill Primary. The trail type is singletrack.

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