This is a very small network of trails on an island. There is a completely flat walking/jogging/dog walking/sight seeing/bicycling trail around the perimeter (wonderful views), then a bumping hard climb to the top, where there are several small singletrack trails. Coming down can be fun, there are several extremely hard ways down. Very short ride, but fun.
This is a small island located pretty much in downtown Richmond. There is a parking lot off of Tredegar street (from downtown take 5th or 7th street south, take a right on Tredegar Street, go past the Tredegar iron works and park under the train tracks.
http://www.singletracks.com/item.php?c=1&i=838