Question for all the ultra runners and even marathon runners out there. I have signed up for a marathon on May 1st and I have always wanted to do an ultra. I just found one that is in my hometown 4 weeks after the marathon. It is a 50k trail run. I have been progressing in my marathon training and my question is 2 parts.
1) Is 4 weeks enough time between the two if I am going to push the pace in the marathon, but don't really care to much about the 50k and am just doing it for fun?
2) Is the extra 5 miles for the 50K enough that I should change my marathon training program? I have three 20 mile runs with a 10 miler the day before in my current program and am curious if I will need to change the distance at all.
Thanks for the input.