I did 3 laps of Prospect Park, 10 miles in the park and about 14 total. It felt fine, but I wasn't pushing it at all except one point where 3 guys came blasting past me so I caught up to them and paced them for a minute at 20mph. I hit 445watts on the chase. Since I have all the training tools I'll be able to track progress pretty well. I was able to track that I was slowing down over the last few years when my average watts on the park rides kept going down even though it keeps feeling harder.