more stats
3,784 ft
Distance
536 ft
Climb
00:11:41
Avg time
536 ft
Altitude change
1,044 ft
Altitude min
1,580 ft
Altitude max
1,044 ft
Altitude start
1,580 ft
Altitude end
14.155%
Grade
4.297%
Grade max
30.461%
Grade min
3,743 ft
Distance climb
42 ft
Distance flat
00:11:41
Avg time

Colby Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Glendora
    , California
  • Difficulty Rating
    Blue Rate
  • Local Popularity
    85 in Mountain Biking heatmap [+]
    • 5 in Trail Running
    • 85 in Hiking
  • Global Ranking
    #57983 in Mountain Biking [+]
    • #333607 in Trail Running
    • #74982 in Hiking
  • State Ranking
    #1,754 in Mountain Biking · California [+]
    • #13,617 in Trail Running
    • #4,230 in Hiking
  • Trail Type
    Singletrack
  • Direction
    Both Directions
  • Climb Difficulty
    Black Diamond
  • Physical Rating
    Hard
  • Dogs Allowed
    Yes

No community description for Colby trail has been added yet!

AI Generated Description

Colby is a 3,784 ft popular blue difficulty singletrack trail located near Glendora California. This mountain bike primary trail can be used both directions and has a hard overall physical rating with a 536 ft black diamond climb. On average it takes 11 minutes to complete this trail.

Tags

Local Trail Association

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 1 rides
  • 24 miles avg distance
All
  • 15 rides
  • Last: Feb 22, 2025
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Colby 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)
Jun 17, 2021 @ 6:01am
Jun 17, 2021
Feb 3, 2021 @ 6:38am
Feb 3, 2021
 Beautiful trail conditions
Aug 6, 2020 @ 7:28am
Aug 6, 2020
 Quick steep double track but plenty of hikers
Aug 5, 2020 @ 6:36pm
Aug 5, 2020
 Black diamond but it’s just steep
more »
Status:
on Dec 12, 2025
Very Dry
Avg: 4.13 (1 votes)
Your vote: 0

view (397)
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      Directions to colby trailhead (34.153217, -117.845949)
      View on Discover Map 3D Tour

      Photos

      3 more »
      mtb
      55 |
      Dec 27, 2023 @ 9:37pm
      Dec 27, 2023
      mtb
      51 |
      Dec 27, 2023 @ 9:37pm
      Dec 27, 2023
      mtb
      212 |
      Nov 9, 2012 @ 8:32pm
      Nov 9, 2012
      Views 1

      Videos

      1 more »
      Mantis Racing
      mtb
      0:16 | 256 | Feb 22, 2016 , Glendora

      Technical Trail Features (TTF)

      5.0 ★★★★★
      1 Ratings
      5 ★ 100%
      4 ★
      3 ★
      2 ★
      1 ★

      Reviews / Comments

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      Nearby Trails

      Glendora

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      Frequently Asked Questions

      ▼ Where is Colby located?
      Colby is located in Glendora, California, United States. It is part of the Glendora trail network. The trailhead is located at coordinates 34.15322, -117.84595.
      ▼ How hard is Colby?
      Colby is rated as Blue difficulty. The physical rating is Hard. The average grade is 14.155%. The climb difficulty is rated Black Diamond.
      ▼ What is the elevation gain for Colby?
      Colby has 536 ft of elevation gain. The elevation ranges from 1,044 ft to 1,580 ft.
      ▼ Is Colby a point to point trail?
      Colby is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Colby?
      Colby is 3,784 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Colby?
      Yes, dogs are allowed on Colby. Please keep dogs on a leash where required and clean up after them.
      ▼ How do I access Colby? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Colby are: View all parking locations in the area.
      ▼ How long does it take to ride Colby?
      Based on recorded activities, it takes an average of 12 minutes to ride Colby. The trail is 3,784 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Colby?
      Colby is a very popular trail. There have been 377 recorded activities on this trail. The trail has received 397 check-ins. View recent activity on this trail.

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