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Level: Advanced
Length: 24 mi (38.6 km)
Surface: Singletrack
Configuration: Loop
Elevation: +1,355/ -1,392 ft
Total: 8 riders

Mountain Biking Frog Lake Loop

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#36 of 316 mountain bike trails in Idaho
#3,220 in the world

Ride this loop either direction. Either way there will be amazing scenery, either direction there will be long singletrack climbs and awesome descending. The write up below describes a clockwise ride up Little Boulder Creek and down Big Boulder.

Aside from the road between Big and Little Boulder Trailheads, the entire trail is singletrack and open to motorcycles.

The climb up from Little Boulder Creek Trailhead starts steeply right away on good singletrack. Then becomes rocky and technical with some hiking involved. Further up the trail is forested and sweet. The section from the Chamberlain intersection to Frog Lake has some loose and rocky sections as well but is mostly ridable.

From Frog Lake there is about 2 more miles of climbing before you reach a broad saddle and the trail begins descending.

The singletrack descent is about 6 miles long and is full of berms and bridges. Lookout for hidden sharp turns after superfast sections. The upper descent is mostly pine duff and grippy. Toward the bottom some rocky sections keep you honest but are still not too technical.

Big Boulder Trailhead is at the bottom of this descent. Take the road back to your car if you parked at East Fork or Little Boulder.

Do this ride before the politicians make it wilderness!!

First added by chukt on Aug 28, 2010. Last updated May 1, 2020. → add an update
Before you go
  • Drinking water: unknown
  • Lift service: unknown
  • Night riding: unknown
  • Pump track: unknown
  • Restrooms: unknown
  • Fat bike grooming: unknown
  • E-bikes allowed: unknown
  • Fee required: unknown
This trail information is user-generated. Help improve this information by suggesting a correction.
Getting there
From ID75 head south on the East Fork Road. This is about 20mi west of Challis and about 4mi east of Clayton.

Drive south for 17.5 miles. The road is paved most of the way, then easy driving gravel.

This Loop can be accessed from two trailheads or the Big Boulder/East Fork intersection depending on the direction you ride the loop and how much driving you want to do beforehand.
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Frog Lake Loop Trail map

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ojk1113 (on Sep 17, 2017)
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Dry (on Sep 13, 2015)
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  • adeckard

    Great loop. Certainly backcountry style riding at it's finest. I'd recommend riding up Big Boulder and down Little Boulder. While Big Boulder is probably more fun of a descent, the climb up Little Boulder is brutal. Check out some photos of the trail on my site - http://alexdeckard.com/prospecting-idaho/

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  • chukt   ✓ supporter

    Check the May issue of Bike Mag for a write up on more of the White Cloud trails.

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  • sidehiller1

    A strong climb followed by a great descent. Great alpine views from the upper elevations.

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