Marl Ravine Trail Professional Review and Guide
"This ride's general location is 11 miles west of Williamsburg off Interstate 64 at the Croaker exit. Scenery includes unique, highly fertile coastal plain environment with growths of glade fern, ginseng, and rare native orchids among black walnut, southern sugar maple, and chinquapin oak.
This is a challenging course for competitive mountain bikers. The ride consists of two loops that form a figure eight of sorts. If this ride is too much, you will be glad to see Bail-Out Trail about a mile into the first loop, a combo of the Marl Ravine Upper and Lower Trails. Marl is a mixture of clay, sand, and limestone along with some shell fragments."