Longer Run

Lately I have skipped a few runs. Given that I am already at a minimum number of runs per week, skipping one or two of my essential runs will likely hurt my marathon time. I did a my longer run - 29km - with some friends and my legs were very tired after 25km. In fact, I had to walk for quite a while. This is a sign that I might not be training enough to last the distance.
I'll try another 32km two weeks down and that would be the furthest that I will go for this round of training. Given my current condition, my timing will likely be above four hours. Hopefully, the last month of training might make some difference.