A race report from the adidas City Night Berlin 10K, including course details and race atmosphere, plus how marathon training quietly built my first sub-36-minute finish this year.

I flew from Berlin to Chicago two weeks after running my first sub-three-hour marathon, slept three or four hours a night, forgot my nipple tape, and still ran another PB. Here's how the Chicago Marathon went, from the starting corrals to the finish line topless.