13 miles is 21 km

The last time I went running (three days ago) I took Lincoln Ave, from Belmont Ave, out to the lake and I wondered if maybe I should continue out to Navy Pier. It was cold and just about to rain. I made the decision not to go there and I would later regret it since it didn’t seem that much longer.
Yesterday I left work 30 mins early since I wanted to run again but had to be back before 18.00. When I got out to the lake I still hadn’t decided but all of a sudden I found myself running “south” and not “home”. When you think in miles everything seems shorter. I didn’t think it’d feel that much longer. 21 km might not seem like a killer distance to you – and in all honesty it wasn’t really to me either, I didn’t crawl or anything – but I don’t think I ever ran that far before and my knees are surely letting me know today. Yikes!