It was "feels like 10 degrees" as I did a BM Track workout with stops after each leg starting from the first 400. I kept having my throat congested, maybe due to the cold, which made breathing difficult. The spit I cleared out froze less than a minute after hitting the grass - a sign that it's pretty cold. Including the warmup, about 5 miles. So much stopping, though. Felt out of shape. Maybe the intermittent sleep over the retreat? My arms really felt the strain of effort.