more stats
2,592 ft
Distance
60 ft
Climb
-19 ft
Descent
00:04:59
Avg time
41 ft
Altitude change
572 ft
Altitude min
634 ft
Altitude max
593 ft
Altitude start
633 ft
Altitude end
1.6%
Grade
-6.3%
Grade max
13.5%
Grade min
1,007 ft
Distance climb
591 ft
Distance down
909 ft
Distance flat
00:04:59
Avg time

Derailer Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Henry's Ridge Open Space
    Maple Valley, Washington
  • Difficulty Rating
    Black Diamond Rate
  • Voted Difficulty
    Blue (1 vote)
  • Local Popularity
    85 in Mountain Biking [+]
    • 90 in Trail Running
    • 70 in Hiking
  • Global Ranking
    #63105 in Mountain Biking [+]
    • #61606 in Trail Running
    • #37787 in Hiking
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC
  • Direction
    Downhill Primary[+]
    Popular Direction Shown
    • Downhill Primary for Trail Running
    • Downhill Primary for Hiking
  • Physical Rating
    Moderate
  • Dogs Allowed
    Yes
  • eBike Allowed
    No
  • TTFs on Trail
    Bridge, Log Ride, Skinny

Technical trail that features the infamous Troll Bridge: a log-ride that takes you over a pond. If you fall in, you're getting wet If you choose not to attempt it, you can bail out before-hand onto Once Upon A Time via The Lorax. There is also an easier skinny, a raised ladder bridge with a turn, and plenty of obstacles to keep you busy.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 4 rides
  • 10 miles average
6 Months
  • 70 rides
  • 10 miles avg distance
All
  • 948 rides
  • Last: Sep 24, 2026
c1c2c3c4
January
February
March
April
May
June
July
August
September
October
November
December
update trails status or condition

Derailer Trail Reports

statusdatedescription
May 12, 2026 @ 5:30pm (America/Vancouver)
May 12, 2026
Jun 26, 2025 @ 5:29pm
Jun 26, 2025
Apr 15, 2025 @ 5:36pm
Apr 15, 2025
Mar 27, 2025 @ 6:53pm
Mar 27, 2025
 standing puddles, water running through one segment
Dec 31, 2024 @ 11:45am
Dec 31, 2024
more »
Status:
on May 12, 2026
Ideal
Avg: 3.91 (7 votes)
Your vote: 0

view (3,706)
close
      Directions to derailer trailhead (47.350970, -122.012370)
      View on Discover Map

      Photos

      9 more »
      mtb
      72 |
      Aug 14, 2024 @ 10:07am
      Aug 14, 2024
      mtb
      79 |
      Jul 26, 2024 @ 2:35pm
      Jul 26, 2024
      mtb
      314 |
      Jul 20, 2019 @ 4:47pm
      Jul 20, 2019
      mtb
      311 |
      Jul 19, 2019 @ 5:40pm
      Jul 19, 2019

      Videos

      2 more »
      MtB Henry's Ridge
      mtb
      14:34 | 314 | Mar 2, 2023 , Maple Valley
      No Explanation Necessary
      mtb
      0:16 | | Apr 6, 2017 , Maple Valley

      Technical Trail Features (TTF)

      Routes with this trail

      147
      Snakes, Beavers and Most Blacks
      14 miles • 1,196 ft • 20 • Loop •
      A fairly extensive tour of Henry's Ridge Open Space, that takes most blues and the few "blacks" from the...
      60
      Out and Back Pedal to Flow
      6 miles • 484 ft • 11 • Out & Back •
      A planned route of some of the fun things at Black Diamond/Henry's. Without focusing on the popular...
      227
      All Diamonds
      ★ 3.0 • 15 miles • 976 ft • 50 • Point to Point •
      This route hits all the advanced trails.

      Trail Products

      3.9 ★★★★★
      7 Ratings
      5 ★ 14%
      4 ★ 57%
      3 ★ 29%
      2 ★
      1 ★

      4 Reviews & Comments

      gnarlord
      The troll bridge and the log ride are super slippery except in the driest of conditions. There are no traction enhancements on them, so proceed with caution!
      jmbrunson
      I wouldn't call this a black. The troll bridge is the only black feature, and it has a prominent ride-around.
      trailtrailers
      It appears that the trail route had been shortened, still a fun, technical ride. The troll bridge was overgrown earlier this year, but is now visible and ready to ride.

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      Nearby Trails

      Henry's Ridge Open Space

      • By overdrive47 & contributors
      • #34232 - 3,254 views

      Frequently Asked Questions

      ▼ Where is Derailer located?
      Derailer is located in Henry's Ridge Open Space, Maple Valley, Washington, United States. It is part of the Henry's Ridge Open Space trail network. The trailhead is located at coordinates 47.35097, -122.01237.
      ▼ How hard is Derailer?
      Derailer is rated as Black Diamond difficulty. The physical rating is Moderate. The average grade is 1.6%.
      ▼ What is the elevation gain for Derailer?
      Derailer has 60 ft of elevation gain. The trail has 19 ft of elevation descent. The elevation ranges from 572 ft to 634 ft.
      ▼ Is Derailer a point to point trail?
      Derailer is not a point to point trail. The direction is Downhill Primary. The trail type is singletrack.
      ▼ How long is Derailer?
      Derailer is 2,592 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Derailer?
      Yes, dogs are allowed on Derailer. Please keep dogs on a leash where required and clean up after them.
      ▼ When is the best time of year to ride Derailer?
      Based on activity log data, the most popular months to ride Derailer are:
      • August (34 activities)
      • September (34 activities)
      • March (33 activities)
      Check the reports page for current trail conditions.
      ▼ How do I access Derailer? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Derailer are: View all parking locations in the area.
      ▼ How long does it take to ride Derailer?
      Based on recorded activities, it takes an average of 6 minutes to ride Derailer. The trail is 2,592 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Derailer?
      Derailer is a very popular trail. There have been 3,581 recorded activities on this trail. The trail has received 3,706 check-ins. View recent activity on this trail.

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