Big South Fork

4.16 out of 5
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↑ 5,300 ft
↓ 5,100 ft

avg time
Trail Description
About this trail
In Big South Fork National Recreation Area, some steep deep woods trails, some moderate, lots of woods, creeks, logs, rocks, mud. Some technical, some not. Single track to dirt/gravel roads to short paved stretches. Great scenery.
added by WBrown729Gramcounter
Trail Features
Trail features
  • Lift Service
  • Drinking Water
  •   Night Riding
  • Pump Track
  • Restrooms
  • Winter Fat Biking
Directions to Trailhead
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Trail Q&A
Rider Questions


Q: How many miles of beginner trail are there. -genedona

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System Trails (4)
System Trails (4)
Grand Gap
Rock Creek
John Muir Trail along Chestnut RIdge
Duncan Hollow Bike Loop
Local Info & Nearby Trails
Trail Check-ins
Trail Check-ins
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Recent Trail Check-ins     (40 total check-ins)
  bemery   1 week ago
  LeighS68   on Aug 25, 2019
  LeighS68   on Aug 25, 2019
  marc_laker   on May 31, 2019
  LeighS68   on Apr 29, 2019
Photo & Video Gallery (362)
Trail Photos & Videos (362)
Reviews (8)


August 22, 2015
Review: There is a reason BSFNRA obtained epic status. Trails include awesome overlooks, rock houses, old homesteads, fast flowing single track above and below bluffs. There are a couple of beginner friendly trails for the lesser experienced riders.


July 17, 2014
Review: Rode Grand Gap with some new friends. This trail has a lot to offer, fast flowy, tech, rocky/rooty and some sweet lookouts. We saw several snakes along the way...a rattlesnake, a copperhead, a corn snake and a garder snake. The trail tread is very similar to other parts of the Sheltowee...sandy/rocky stuff that is uneffected by rain. Lots of trail here, plan to spend the night because there is just way too much cool trail to see in one day.

Similar Trail: Laurel Lake/Cane Creek


September 27, 2013
watch4me Gramcounter  
Review: Awesome views with great trails. I rode Grand Gap counter clockwise and then rode John Muir north. This is what I would consider a destination trial. One of the best. Go ride it!!

Granny Gear

January 28, 2013
mommabkr Granny Gear  
Review: Great place to ride!!! 5 of the big south fork mountain bike trails just received "epic"status by imba fall of 2012. Great trails for all skills levels. West bandy loop, collier ridge trail, Duncan hollow loop, grand gap, and John muir. Just this month @ least 16 more miles of trail opened on the foe tress county side of the park. I believe it's called chestnut ridge. Trail description can be found on the Bigsouthfork mountain bike cubs website.

Bunny Hop

March 20, 2011
dirtstud Bunny Hop  
Review: BSF is a great place to spend 2 or 3 days camping with your bike. there are trails here for all skill sets. I highly recommend going during the week so you can ride the Grand Gap. Also, the Collier Ridge/Advanced loop is first rate. The downhill section near the end is fantastic. I make sure that I ride here twice a year. The trail departing off 297 (I can't think of the name, sorry) and going down to the O and W bridge is a good ride. Be sure to make it here.

Similar Trail: Nothing quite like it.

Granny Gear

October 18, 2007
bluemidiot Granny Gear  
Review: Park Rangers were fantastic and helpful. Trail maps are at the lodge, make sure to go during the week if you can to do the Grand Gap Loop. Spent two days camping and riding out here. Time well spent.

Similar Trail: Haw Ridge and Norris Dam

Granny Gear

January 8, 2007
honkonbobo Granny Gear  
Review: We rode the Collier ridge trail in the pouring rain and given the conditions it held up better in the rain than any trail i have ever ridden. Nice rolling single track that most would call intermediate at most in difficulty. A couple creek crossings and a shortish "advanced" section that has some ups and downs and offcamber stuff keep it interesting but overall not overly physically demanding as there are no real major climbs. Nice down hill near the end after the ride on the ridge is a nice sendoff as well. Great for an hour or so ride but not an all day trail.* Review edited 1/8/2007

* Review edited 1/8/2007

Granny Gear

August 3, 2006
susy1313 Granny Gear  
Review: This trail info actually refers to two different trail, Duncan Hollow and Collier Ridge. Duncan Hollow is about 7.5 miles total with around 3 miles of that singletrack. It is some climbs and rolling woodsland. The better trail of the two is Collier Ridge with around 9 miles total and about 6 miles of that singletrack if you take the advanced segment. Collieir ridge has some good climbs, easy technical sections, nice ridge riding and a great downhill near the end. Also check out Grand Gap, which the park service just opened to mountain bikes July 2006

Similar Trail: Grand Gap

Big South Fork MTB Trail 4.16 out of 5 based on 8 ratings. 8 user reviews.
Trail Conditions
Trail Conditions          < / > embed