3,864 ft
Distance
36 ft
Climb
-546 ft
Descent
00:05:11
Avg time
Trail Supporters, Builders & Maintainers of Upper Decker Trail

Upper Decker Details

  • Riding area
    South Hills
    Helena, Montana
  • Difficulty rating
    Double Black Diamond
  • Trail type
    Singletrack
  • Bike type
    AM
  • Trail Usage
    Biking Primary
  • Direction
    Downhill Only
  • Physical rating
    Hard
  • Season
    April - November
  • eBike Allowed
    No
  • Ride in rain
    Yes
  • Global Ranking
  • Land Manager
    USFS

Upper Decker runs along the ridgeline above Dump Gulch. It's an old-school fall-line trail and is very steep towards the end. There are several rugged rock outcrops along the trail up higher.

This is an unofficial trail that is not part of the inventoried South Hills network. Access and conditions are subject to change without notice.

Access Info

Take a right off of the Mount Helena Ridge Trail on to South Dump Gulch. You climb to a small knob, and from there it's all downhill. Don't follow South Dump to the left into Dump Gulch, and instead go straight following the ridge all the way down to Grizzly Gulch.

This trail is Unsanctioned, Ride at your own Risk!

More Stats for Upper Decker mountain bike trail
  • Altitude change
    -509 ft
  • Altitude min
    4,303 ft
  • Altitude max
    4,833 ft
  • Altitude start
    4,833 ft
  • Altitude end
    4,323 ft
  • Grade max
    -39.585%
  • Grade min
    28.526%
  • Distance climb
    564 ft
  • Distance down
    3,182 ft
  • Distance flat
    118 ft
  • Avg time
    00:05:11
  • view trail stats
Status:
on Nov 1, 2017
Snow Covered
Avg: 3.65 (9 votes)

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Directions to upper-decker trailhead (46.579630, -112.069910)
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Upper Decker Trail Reports

datedescription
Nov 1, 2017 @ 11:24am
Nov 1, 2017
reporter First real snowfall of 2017/18
Sep 27, 2017 @ 7:01am
Sep 27, 2017
reporter Always best after some moisture.
Sep 14, 2017 @ 5:37am
Sep 14, 2017
reporter
Jun 6, 2017 @ 8:09pm
Jun 6, 2017
May 21, 2017 @ 8:44pm
May 21, 2017
reporter
view all reports »

Photos

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2 Reviews & Comments

  • + 1
flag evasive MBG (Apr 8, 2016 at 9:26)
 Trail fairies have been laying logs and sticks across the trail this spring. Keep your eyes open and ride cautiously.
[Reply]
  • + 1
flag lyophilization (Apr 17, 2017 at 15:28)
 This trail is pretty awful. Who ever built it couldn't decide between a gnarly fall line trail and a curvy trail, and the result is fast downhills followed by curves. Skip this trail and keep riding down South Dump Gulch trail.
[Reply]

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