Is one month enough time to train for a Half Ironman?

Long story short, I’ve always been an avid athlete competing in XC and swimming throughout high school. When I got to college I needed to find something else to keep me active/busy…and so I invested in a bike and fell in love with the sport.

Fast forward 2 years and several Olympic and sprint distances later and few half marathons thrown in, I signed up for a 70.3 (1.2 swim, 56 bike, 13.1 run) back in October and the race date is for May 1, 2010 (gave me a good 6.5 months of training).

However, due to a few knee issues training got put on the back burner for a while while I just focused on rehabilitating it, swimming lightly, light exercise.

I’ve been cleared by all doctors to jump right back into training full force :)

Best news I’ve had in a while, so I celebrated with a ~5 mile tempo run just to see how things felt. YIKES!!! It hasn’t been that hard for me to run that distance since freshman year of HS.

So I guess t this point, FINISHING is my first and foremost goal, but is even that doable? I haven’t been on the bike since Thanksgivingish and swimming is the only thing I have even a moderate base in.

SUMMARY:
*Avid athlete past 6–7yrs
*Knee injury put me out of commission for 5 months
*1 month to a half ironman feasible?

Any input/advice/motivation I will lurve you forever :)