I'm training for a 7:20 marathon pace and this was my first pace run. Apparently there is some benefit to following up pace runs with LSD (long slow distance). It was difficult to pull this one off. Mostly because of darkness and snow. The darkness made it difficult to see my Garmin (I really need to be able to glance at it every few seconds to hold pace) and the snow provided resistance. Thankfully my YakTrax did their job and provided good purchase.