Greensboro's three watershed lakes north of town - Brandt, Townsend and Higgins - offer 42 miles of natural surface trail, trail that exposes trail runners to all manner of flora and fauna common to a riparian Piedmont environment. There are various spots to begin your exploration of the three lakes; one of the best and most accessible is Bur-Mil Park off Battleground Avenue. From Bur-Mil you can pick up: * Nat Greene Trail. This popular 3.6-mile trail loops through a diverse forest of hardwoods and pines with nice carpets of running cedar. Interpretive signs along one stretch help you figure out what you're looking at. * Owl's Roost Trail and Fire Road. You share this 5.6-miles of trail with mountain bikers and hikers; if the trail design seems unusual in spots, that's to accommodate the fat tire set. * Palmetto Trail. At 1.6 miles this loop trail is short but features some intriguing geology. * Piedmont Trail (accessible by heading north on the Lake Brandt Greenway and picking up just past the bridge, on the right). There's a good deal of exposure on this 2.75-mile (one way) trail, which takes you through an impressive stand of kudzu (the vine that ate the South) and assorted bushes bearing berries. The watershed lakes offer a remarkable concentration of running trails for an urban area. More info: Greensboro Parks and Recreation Department Maps: Downloadable here, available at the park.