However , when I passed the first mile , the clock read 7 : 20 , and I was worried that I made my classic pacing mistake : going out too fast .
I would have estimated my pace at about 7 : 45 .
When I passed the first mile , the clock read 7 : 20 , and I was worried that I made my classic pacing mistake : going out too fast .
I would have estimated my pace at about 7 : 45 .