One-way only (downhill). Trail system is closed when trails are wet and during spring/fall freeze & thaw cycles. Check here for current trail conditions.
A long descent, for IL, with a drop of ~100' from the upper South System Loop. The first section is pretty mellow. Another 50' down the trail, if the undergrowth isn't in the way, you'll have a great view of the trail winding through the ravine below. The trail ends along the base of the large grass hill heading back towards the trailhead parking lot.