This out-and-back trail is open year-round and is a showcase of the beautiful trails in middle Tennessee. The trail follows the shore of Percy Priest Lake for most of the route, and there are frequent views of the water. It is the longest trail at Long Hunter State Park. The Volunteer Trail and the Day Loop have their own parking lot and a clear distinction of where the trailhead begins. The Volunteer Trail leads to a pair of primitive backcountry camping sites, which is the turnaround point.
Here is a link to the route in Strava: https://www.strava.com/segments/12553316
Here is a link to the route in AllTrails: https://www.alltrails.com/explore/trail/us/tennessee/volunteer-day-loop-trail
Here is a link to further description on Tennessee State Park's website: https://tnstateparks.com/parks/activity-detail/long-hunter-hiking
Heads up, the distance on this route should be in miles, not kilometers. I measured about 10.5 miles round trip.