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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Layers winter
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Trail transparency
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Ibis Demo Day in Salmon
Ibis Demo Day in Salmon
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Oct 3, 2014

Recent Trail Reports Along Route

Lower Williams/Perreau
May 7, 2016 @ 5:32pm
May 7, 2016
Overgrown vegetation
Lower Williams/Perreau (DH)
May 7, 2016 @ 5:29pm
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.
Ridge Road (020)
Jan 27, 2016 @ 9:15am
Jan 27, 2016
The Ridge Road is groomed for snowmobiles. Don't expect virgin corduroy, but it is usually firm enough to ride. Ridge Road south from Wms Summit sometimes is rough from the FAA maintenance cat that visits Lake Mtn.
Perreau Creek (027)
May 30, 2015 @ 6:46am
May 30, 2015
more reports »
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