I walked 16 miles this morning in under 3.5 hours, so I'm averaging 13-minute miles right now. I felt pretty good the entire time, except for a blood blister that formed on top of my old water blister. Very painful. Tom, my walk coach (and former Olympian), said that my orthotics were the cause of my one recurring blister. So I'm going to try Mole Skin & a band-aid on top of my usual Vaseline.