Ever since Hurricane Wilma did more damage to trees than buildings, mountain-biking trails have been the slowest places to recover. As an example of how a trail can be fixed up like new, look to Sunrise's sandy gem: the Markham Park Mountain Biking Trail, tucked into the 666-acre park just west of the Sawgrass Expressway and north of State Road 84. Broward County has been steadily rebuilding the harrowing climbs and steep drops of the ten-mile trail system with earth mounds dredged from the park's lakes. They've cleared away most of the downed melaleucas, Australian pines, and giant ferns to make the meandering journey over packed sand a little less treacherous. Oh, you were hoping for treacherous? Well, for the fey and the fearless, there are the narrow bridge crossings, perilous drops, abrupt switchbacks, and other miscellaneous obstacles on the highly technical trail called Rattlesnake Ridge. The park usually closes at 6 p.m., but it's 7:30 on those endless weekend summer nights.