This ride consists of two semi-loop sections, loop A and Loop B combined. The original Loop A is around 4.0 miles. Loop B adds an additional 2.5 miles. It is fairly new and well marked.
This ride starts right out of the visitor center parking lot. Look for the "Boston Mountain Trail" sign marking the trailhead. Head counter-clockwise to get most of the climbing out of the way at the beginning.
Most of the trail consists of dirt with some small loose rocks on some turns, so it is not too technical (of course if you ride in the fall, you'll have a lot of leaves on the path, so use extra caution on the turns especially on the Boston Mountain Trail - Loop B
). There are a few small water drainage crossings that have well-placed boulders to use when crossing.
This whole ride has some great downhill spots with berms built up to speed through the turns. The first part of the trail descends slightly until the junction cut off for Loop B, it then meanders up the valley a little over a mile and then turn back south towards the lake for some fun downhill sections. You'll get to climb some more at various points however, but once you get near the section that wraps around the group camping and cabins, it's smooth sailing as you try to peer through the trees to get a quick look at the lake while speeding back down towards the Boston Mountain Trail - Loop A
As you approach the Loop A and B junctions, after crossing the park road, be on the lookout for a Y in the trail (that is not marked!) about 25 yards into the woods. You'll want to turn right at the Y if you are heading back out to the trailhead. You'll then head uphill on this short connecting trail and soon see the Loop B cutoff that you took before. From there, it is just a short ride back to the parking area.
Lake Fort Smith marks the western most point of the Ozark Highland Trail. It's worth taking some time to enjoy the history of the area at the visitor center and lake.