I'm a recent college graduate who ran in high school and cycled competitively in college. I'm looking to run a November marathon, but am coming off a fairly serious surgery. I had been hoping to run under 3 hours, but medical problems set me back to nearly 0 back in May. I've been doing what I can since, but the recovery process has been slow so far and I've only managed 20-25 mile weeks for the last month or so. As I gear my training back up, is it still reasonable to shoot for a 3 hour marathon 4 months from now, or should I scale back my goals a bit? Thanks.