This hike begins at the Turkey Pen trailhead at the end of Turkey Pen Road. The unpaved road is narrow at times and riddled with potholes. Use caution and know that you may encounter vehicles towing horse trailers as you drive it. At the parking area, look for a painted line in the gravel separating the horse trailers from smaller vehicles.

Begin your hike to the left of the kiosk. The loop first heads down to the South Fork of Mills River then crosses it over a suspension bridge. Equestrian users utilize a ford just beyond the bridge. Once you're across, take a hard left to continue on the South Mills River Trail.

From here, you can complete the loop in either direction. Counter-clockwise, you will climb up Mullinax to Squirrel Gap, then return on Poundingmill. Several old forums list an abandoned steam locomotive in a ravine off of Mullinax. As of 2019 though, it appears to have been either removed or completely overgrown and unrecognizable.

The return trip down Poundingmill is steep at first, then steady as it follows the drainage of a mountain stream. Expect you may get your feet wet after recent rain.

If you'd like to turn this into an overnight trip, South Mills River Trail offers several primitive camping opportunities on the return trip. Should you head further up the trail away from this mapped loop, you can find even more. Few venture this far though as the trek requires multiple wet crossings of the river, many of which are waist deep.