For the second year, the .US National 12K championships will be held in Alexandria, capping off the 2014 USA Running Circuit (USARC).
How it works: The USARC each year hosts national championships at distances ranging from one mile to the marathon. The first 10 U.S. runners at each race earn points, and also qualify for the 12K, which features $100,000 in prize money. Points are doubled at both the 12K and in the marathon.