Jackfork MTB trail While staying in Little Rock, Arkansas for one night only, I decided to see if I could find a trail to ride close by in the afternoon. I found Jackfork MTB trail at Pinnacle Mountain State Park and headed out for a pedal. While I applaud the effort of the local riders to design and build this trail — it’s ~7 miles on a 1/4 mile square area — Was not the best trail I’ve ridden. Maybe it was the time of year: the beginning of winter has seen all the leaves leave (!) the trees and cover the trail completely; I could not make out the trail at all!