All eyes will be on high school phenom Mary Cain.
James J. Connolly won the inaugural event in 1926.
Check out these shots from over the weekend!
The newly minted 3:50 miler will be going for the American record on Saturday.
He wants to go for sub-3:50.
It was his first race on the roads.
The former University of Oregon standout ran the 1500m in 3:31.96.
Matthew Centrowitz finishes fourth as the U.S. brings home another distance medal.
Shannon Rowbury, Jenny Simpson complete women's team; Matt Centrowitz, Andrew Wheating round out men's squad.
The men's 1500m race will be especially exciting.