I've been riding for some time in South Florida without a problem. I want to try and do the Livestrong Challenge this year (Philly, possibly). I'd love to do the full century, but coming from a completely flat terrain to 4000+ ft climbs, I'm afraid I'd be too exhausted to even do much more than the 40. Is there any workout regimens, or places to train in South Florida for climbing at all? All I know of is the Key Biscayne causeway over and over and over.