About 2 miles / 3.2 km through the neighborhood. Did a little bounding down by the track but then thought better of it. Better to wait until I've been back running a few weeks and my knee is 100% before trying this new stuff. Was 39 windchill, so I guess it counts for the winter challenge, but that's like the perfect temp for me so it hardly felt challenging. If there's no soreness in the knee tomorrow I'll try three miles on Tuesday. Meanwhile, I'll be icing it and putting on Dama's lotion potion throughout the day.