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Croy Creek Loop


A tour of the Croy Creek trails; big views and new singletrack.

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6,414' 1,955 m


5,560' 1,695 m


1,061' 323 m


1,084' 330 m



Avg Grade (3°)


Max Grade (13°)

Bureau of Land Management Treasures

One of the Bureau of Land Management's "Backyard to Backcountry" treasures, this trail was developed between IMBA and the Twin Falls, ID BLM office to provide world-class riding experiences.

Check out the top 20 BLM Backyard to Backcountry rides!

Dogs Unknown

E-Bikes Unknown


The Boullion Gulch Loop covers the western side of the Croy Creek Trail System. The route features a few major climbs, plenty of fun descending and beautiful views throughout.

Riding clockwise is recommended to make the most of the big descent from the saddle on the upper portion of Two Dog.

Optionally, the route could be started from the main trailhead, off Croy Creek road.

Need to Know

The Croy Creek trails underwent major renovations after the Beaver Creek Fire in 2013. The trail system re-opened July 1, 2015, and the trails are still settling in. Conditions may vary - expect a few soft and sandy spots here and there.

Parking is limited along Bullion Gulch road with a few small spots between Bullion Connector Trail and the western end of Two Dog.


From Bullion Gulch Road, start on the western end of Two Dog up a long and steady climb up a large dry hillside through a series of switchbacks into a big drainage. The trail straightens out for a short time and then in and out of a small gully, before resuming the contouring climb up the north side on a long run of singletrack.

The route turns right, around the head of the valley, and proceeds through one more steep-ish turns before reaching the high point - a saddle that overlooks a large dry valley with rugged peaks in the distance.

From here, Two Dog begins the first part of its longest descent on rolling, exposed trail across a steep hillside. As you finish this section and round the base of the hill, the view opens up into the main part of the trails system and the Croy Creek valley.

The end of this descent goes through a series of bermed turns and around a knoll to an intersection with Centerline.

Turn right and enjoy a continuous descent with many bermed turns. At the bottom, stay right again to ride Wilson Gulch, a short but scenic trail. Begin this section of the ride by pedaling over towards a lush drainage. The climb quickly transitions to a gentle descent through a couple of nice flowing turns.

Cross a narrow creek bed through a small grove of burnt aspens and then climb briefly again to gain the hillside above the drainage.

From here, descend gradually across the hillside to the bottom at an intersection with the Punchline Flow Trail.

Continue straight here to climb up to the Bullion Connector Trail. At the intersection stay right to start the traverse back to the beginning of the ride.

The Bullion Connector Trail climbs steadily up to a ridge and then traverses over somewhat narrow, rocky and challenging singletrack to a high point between the main trails and Bullion Gulch. This is another section with amazing views in all directions.

Continue along the contour to the west and then drop down into Bullion Gulch. Pedal back a short distance to the beginning of the ride.


Shared By:

Leslie Kehmeier

Trail Ratings

  4.8 from 11 votes


  4.8 from 11 votes
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in Idaho


227 Views Last Month
7,814 Since Jul 9, 2015



Heading up to the high point of Bull Dog trail.
Jul 9, 2015 near Hailey, ID
Descending Bull Dog trail into the main part of the Croy Creek trail system.
Jul 9, 2015 near Hailey, ID
Descending from the top of Bull Dog trail with nothing but big views.
Jul 9, 2015 near Hailey, ID
Hidden Valley is such a singletrack gem in the Croy Canyon Trail System - Beautiful!
Jun 9, 2020 near Hailey, ID
A short and sweet oasis on Wilson Gulch trail.
Jul 9, 2015 near Hailey, ID
stopping to smell the flowers... along the entire trail !!  (6/14/19)
Sep 30, 2019 near Hailey, ID


Current Trail Conditions

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All Clear 10 days ago See History
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Apr 18, 2021
Brice Corcoran
Oct 7, 2020
Andy Novak
Oct 6, 2020
Kori Neessen
Jun 30, 2020
Jeff Andrus
Jun 21, 2019
Emma McVey
The divine smell of alpine flowers at the drop was simply amazing!
Jul 10, 2018
John Wiser
Jun 28, 2018
Kory K
Jun 13, 2018
tyler whelan