The Poston trail network has several loops of varying difficulty within a very small footprint. The trailhead is on the Lake Loop.
This section features a bi-directional bridge across the creek at a small but scenic waterfall. Trail surface is a well packed mineral-clay with very little rolling resistance. This trail would be a good challenge for a beginner who has a few months of singletrack experience, intermediate-advanced riders will find the constant terrain change fun, and can easily do multiple laps to get their distance in.
The Big Leaf Loop starts and ends at this trail roughly 1/2 of the way around.