Chicago's going fast... Mark G 2/8/11 4:51:25 PM ET
As of Tues, Feb. 8th, 37,000 slots have been filled out of 45,000—if you're going to run it, sign up now. Selling that many slots in 7 days is phenomenal. I recall last year selling out in 51 days—I think it will happen in 14 days total this year. It's a testament to the draw of this race- -240+ days 'til race day and it's nearly sold-out; incredible.
