Kestrel, Sidewinder, Hulls Gultch

4.20 out of 5
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↑ 800 ft
↓ 1,100 ft

avg time
Trail Description
About this trail
This trail starts out easy and becomes more difficult as you climb higher into the foothills. There are detailed marker posts along the way to guide you to the multiple loops in the area. The best trail for those who love a good workout and some fairly challanging single track is to follow the markers to the kestrel trail which climbs gradually at first and soon turns to a more aggresive incline followed by ridge riding for about 3 miles. At this point you can take the Sidewinder trail which is a rugged dirt and sand singletrack carved out only by those who have gone before you, as its name says it twists and turns as it climbs into the clouds and towards the treeline. Once you reach the top of sidewinder you can continue up if you so choose on trail #4 or begin the decent on trail #4 by turning to the left, this connects with the Hulls gulch trail. This again is an aggressive singletrack downhill with plenty of bumps and rocks to manuver around. In general the ride would be suited for anyone familiar with basic downhill riding and a good cardio routine in place beforehand. As this is one of the most popular rides in the Boise area it is known to the locals as the freeway and you will always have company during the 2 hour trek.
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Trail Features
Trail features
  • Lift Service
  • Drinking Water
  •   Night Riding
  • Pump Track
  • Restrooms
  • Winter Fat Biking
Directions to Trailhead
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Recommended Trails
Recommended Trails
Shane's Loop
Local Info & Nearby Trails
Trail Check-ins
Trail Check-ins
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Recent Trail Check-ins     (55 total check-ins)
  iantracy   on Jul 23, 2019
  Colleen Hill   on Jun 28, 2019
  Tour Guide   on Jun 5, 2019
  Colleen Hill   on Jun 3, 2019
  Colleen Hill   on Jun 2, 2019
Photo & Video Gallery (7)
Trail Photos & Videos (7)
Reviews (5)

Bunny Hop

May 27, 2014
Review: We went up and back on sidewinder. Really busy (bikes and hikers) which is to be expected on a holiday. Great trail for a decent climb and not real technical. Watch for some sandy areas.

Granny Gear

May 24, 2012
Review: Kestrel is great for beginners and will always be a favorite ride for anyone! Sidewinder and Hulls Gultch are both legs of kestrel providing uphill switchbacks, long uphill climbs and fast downhills including both tabletops and steep jumps.


August 1, 2007
tfgb Trailblazer  
Review: This is a busy trail but that's because it's a little mix of everything: rolling jumps, long slow steady up hill climbs, steep climbs exciting downhills and some technical riding all within 8 miles. This is one of my favorite loops.

Similar Trail: Shane's Loop


July 30, 2007
tfgb Trailblazer  
Review: This is a good intermediate run because of the good climbs and the fun downhill. It's a little technical down through the Gulch but an all around fun run to do alone or with friends.

Similar Trail: Shane's loop - a little more challenging than this one but similar in Miles.

June 30, 2004
Review: Great rush for downhillers!

Similar Trail: If you like this trail try Bobs or Hard Guy.

Kestrel, Sidewinder, Hulls Gultch MTB Trail 4.20 out of 5 based on 5 ratings. 5 user reviews.
Trail Conditions
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