I think mpw AND long run are both equally important. However, the long run is important because its time on your feet, running, getting your body used to that and to using the appropriate fuel source (not to mention practice time for what you are going to use for fuel, water, clothes, etc). That is the time to "try out" anything so that for race day you are ready. I believe no less than 2 20 milers should be done, however, that is my personal opinion. For my first marathon I did up to 2 22 milers and felt I was jprepared for the distance. I would do no more than two weeks in a row of long runs, my particular schedule is one long Sunday followed by a more intermediate Sunday (for example, one Sunday of 18 miler, then next week only 12. Good luck! Do your research and only do what you are comfortable with!!

Thanks for the advice! I was going to use a Hal Higdon program, but joined the local running store training group. Thank goodness I did. There is no way I would have gone outside this winter. However, the group runs have not been as long as HH. So, I just added when I felt comfortable. With 9 weeks to go I feel great. If my body stays healthy I plan to get a couple 18's and/or 20's. One of each is on the schedule. I just filled out my registration. Had to take several deep breaths before marking the MARATHON box.

You'll find out all sorts of things that you wouldn't on shorter runs. Fuel, water, clothes and endurance ...

Maybe even get to have fun with chafing, if you're lucky