First outdoor workout of 2017. If you ran Boston, you should avoid hard workouts, no track for at least one more week preferably two.
4-7 X (800@10k pace) 200 rest between everything
Then
4 X 200 @ mile 200 rest.
Number of 800’s is based on your weekly mileage.
4= 30mpw
5=40mpw
6=50mpw