12.2 miles
987 ft
-5,110 ft
1.5 miles
High Point

In about 10 miles this ride descends 4700' on various types of singletrack, from buff to primitive and steep. There is some crossing country and climbing to connect Powderhouse Gulch Trail w/ Perreau Creek via either Horn Hunter or Horse Mountain Trails. Always great views to be had along the XC portion. This ride takes from 2 - 4 hours depending on your group.

There are two shuttle options. Leaving a rig at Shoup Bridge Rec. Site is convenient and there is river access and shade, this adds a mile of pavement to the descent. Or park at the junction of Perreau Creek Road and Williams Creek Road.

The dropoff is on the Ridge Road about 3/4 mile south of Williams Creek Summit.

Local Trail Association
Salmon Idaho Mountain Bike Association (www.ridesalmon.com)
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Route POI

RestroomsShoup Bridge Rec. SiteRestrooms
Shuttle Pick-up/Drop-offPerreau Creek RoadShuttle Pick-up/Drop-off


  • AKA
    powderhouse lower williams
  • Difficulty rating
    Black Diamond
  • Route Type
  • Bike type
  • Direction
    One Direction
  • Physical rating
More Stats for Powderhouse to Perreau mountain bike route
  • Altitude change
    -4,122 ft
  • Altitude min
    4,032 ft
  • Altitude start
    8,156 ft
  • Altitude end
    4,033 ft
  • Grade max
  • Grade min
  • Distance climb
    2.4 miles
  • Distance down
    9.5 miles
  • Distance flat
    1,400 ft
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Ibis Demo Day in Salmon
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Oct 3, 2014

Recent Trail Reports Along Route

Powderhouse Gulch
May 28, 2017 @ 11:07am
20 hours
Several chainsaw trees down from pond down to road reporter
Powderhouse Gulch (Lower)
May 28, 2017 @ 11:04am
20 hours
One large tree laying in trail above last switchback reporter
Lower Williams/Perreau (DH)
May 1, 2017 @ 8:46pm
May 1, 2017
Cleared 12 inch down tree across trail about a quarter mile above lower trailhead of Perreau Creek.
Lower Williams/Perreau
May 7, 2016 @ 5:32pm
May 7, 2016
Overgrown vegetation
Horse Mountain
May 7, 2016 @ 5:26pm
May 7, 2016
Large tree down across trail, blocking trail, about 5-6 total.
more reports »
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