Longest Marathon Long Run - How Long?

A common question (because there is a lot of conflicting advice) is, "How long should my longest long run be when training for a marathon?"  In this video, I give you insight into how the length of the longest long run should vary based on the finishing time of the marathoner. After all, a 20-miler for a 2:10 marathoner will only take a little over 2 hours whereas a 20-miler for a 6:00 marathoner would take a very long time.