14.4 miles
Distance
2,771 ft
Climb
-3,447 ft
Descent
1 mile
High Point
-678 ft
Altitude change
6,053 ft
Altitude min
6,781 ft
Altitude start
6,102 ft
Altitude end
-0.9%
Grade
-58.4%
Grade max
51.2%
Grade min
5 miles
Distance climb
8 miles
Distance down
2 miles
Distance flat

The full Decoster trail (#012) from South to North. This trail starts at Dry Ridge Rd and ends at the North Jackpine-Pinochle Loop Rd, crossing Rammel Mountain Rd and many of the decommissioned logging roads and around one dozen creeks and drainages of the Northern Tetons.

Detailed Description
Decoster is a 14 mile popular expert route located near Tetonia Idaho. This mountain bike only route can be used both directions and has a hard overall physical rating. This route includes 1 trails. This route climbs 2,771 ft with a max elevation of 7,093 ft then descends -3,447 ft.

Local Trail Association

Local trail association
Teton Mountain Bike Alliance (www.instagram.com)
Please consider joining or donating to the local riding association to support trail development & maintenance.
Donate to earn trail karma!

Stats

  • Distance
    14 miles
  • Altitude change
    -678 ft
  • Altitude min
    6,053 ft
  • Altitude start
    6,781 ft
  • Altitude end
    6,102 ft
  • Climb
    2,771 ft
  • Descent
    -3,447 ft
  • Grade
    -0.9%
  • Grade max
    -58.4%
  • Grade min
    51.2%
  • Distance climb
    5 miles
  • Distance down
    8 miles
  • Distance flat
    2 miles

1 Review & Comments


We hope you've been enjoying Trailforks!

Create a FREE account to view all route reviews and much more.

Trails in Route

Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Difficulty rating
    Black Diamond
  • Route Type
    Point to Point
  • eBike Allowed
  • Bike type
    AM, XC
  • Direction
    Both Directions
  • Physical rating
    Hard
no votes yet
close
Trail transparency
  • Singletrack
  • Unpaved
mtb
187
mtb
217
mtb
340
mtb
393

Recent Trail Reports Along Route

statustraildateconditiondescription
Decoster Trail
Sep 21, 2025 @ 10:22am (America/Boise)
Sep 21, 2025
Time for an update on the Wyoming Pathways work with help from the Montana Conservation Corps and TMBA on the section between Dry Ridge Rd. and Rammel Mtn. Rd. It’s good and now much better than the old description. You’ll still hike a bike some but, the overall ride is now much better. More updates as we complete this work before snow piles up.
more reports »
  • By danaramosTF Pro TMBA & contributors
  • #62122 - 419 views

Hit the Trail

Open in App

Get this route on your phone instantly.

Download Route

Save to wishlist, Garmin & download.