As I said, I'm going to try to push my daily runs from 4 miles to 6 miles over the next few months. There's no particular reason other than I'm enjoying running more often and not having the pressure of doing LONG runs.
The way I'll start that is to do a little walking at the end of the regular workout. So, I did my "normal" 4 mile run and then added a 1/4 mile of walking. Once that feels OK, I'll try run/walking the 4.25 miles and adding 1/4 to the end.
ORN: 4.25 miler; R5/W1 [4 miles], walk .25 miles, 50 minutes total