We know many of you don't live in Boston and don't want to pay 19.99 to watch it so we'll be posting live updates here.
Women's 1k race is in about 30 minutes.
We just talked to JK. Some may think his conversion charts are too harsh but he stands by them.
He says Jen Toomey's AR of 2:34.19 is equivalent to a 1:58.00 800.
The HS record of 2:43.40 which belongs to Sarah Bowman (now Brown) is equal to about a 2:04.77 according to JK.
Men's 5k is after that.