How did the girls hurdlers in Pennsylvania improve from last season to this season?
A number of girls saw big drops in time from last year to this year. Trinity's Mia Kilroy (above) improved a second and a half in both the high and intermediate hurdles since last season, culminating with a third place finish in the 300-meter hurdles at states
The lists only include athletes who have registered times in 2017 and 2018 in the particular event.
The lists are sorted with the top improvements in each event at the top. Check out lists in the hurdle events -- 100m hurdles and 300m hurdles -- below.