Hey Cryptic -- If you now live in Gainesville, you should check out San Felasco, which is just north of the city. It's not Alafia. It's more cross country, but much hillier than, say, WTA. If you hit all the loops, it's a solid work out. I'd say at least 20 miles of trails. Probably a bit more. Here's the map:http://www.sanfelasco.net/docs/San%20Felasco%20Bike%20Trail%20map%2005%202009.pdf