Have you thought about running a marathon?
It's a great experience, but the commitment to training is time consuming and exhausting. In fact, if you are considering a marathon, it's not unusual to take up to a year or two plotting out your strategy and mentally preparing yourself for this journey.
The Run To The Finish blog recently posted some tips on how to maximize your time in your marathon training, particularly if you are a busy runner.
If you have been running for a while and you are contemplating a marathon, I highly recommend a visit to www.halhigdon.com. Hal Higdon is a renowned running coach and makes a variety of training plans and resources available to marathoners of all levels.