This is a paved out-and-back multi-use rail-to-trail path. It's flat, long straight sections, and smooth. They also have a dirt path running along side it that may be good for mountain bikes. Quite a few people using it. But very nice ride.
Brandy Branch TH - From Jacksonville, take Interstate 10 west to Exit 50 (new Exit 343) for US 301. Head north on US 301 (toward Baldwin) until you reach US 90. Take a left (heading west) and proceed about 2 miles to Secondary SR 121 (Brandy Branch Road). Take a right (heading north) and continue to the trailhead.<br /><br /><br /><br /><br /><br /><br /><br />Imeson TH - From Jacksonville, take Interstate 10 west to Exit 53 (new Exit 356) for Interstate 295. Head north on I-295 to Commonwealth Avenue (Exit 9). From Exit 9, head west on Commonwealth Avenue approximately 1 mile to Imeson Road. Take a right on Imeson Road (heading north) and continue to the trailhead.
http://www.singletracks.com/item.php?c=1&i=4094