I did a 4.5 mile trail run today. Was wearing the perfect layers for 42-43 degrees and felt pretty good. Had to walk some after the hills to keep my heart rate below 90% of max, but my time was respectable for me (and for trails) at right around 12 minute miles. I used DH's stop watch to get my time for each lap, and I got faster with each succeeding one without trying, so that was pretty cool.

Emily