This short loop around the Marietta High School is a nice route that crosses and follows a stream for several minutes, and has stretches of both grassy and forested singletrack. The forested sections provide excellent shade in the summer months, and this trail makes for a pleasurable outing. It also doubles as a fitness trail, featuring a series of stretching or exercise stations, such as leg raises and pull-ups.
You can hop on this trail to the left side of the parking lot after heading up Academy Drive. Also accessible off this trail is the Ewing Trail, Cisler Trail, and the Prospect Hill Loop Trail (its trailhead is right next to the TIger Trail).