Texas 10 Series College Station

I got up at 5 this morning to make it back over to College Station to run the Texas 10 Series College Station 10-Miler at 7 a.m.  It was 70 degrees and humid.  I finished in 2:27:25, almost my slowest race in this series.  I am wondering if my trail running during the week is slowing me down.  Maybe I need to run more on the park roads.  In any case, I was 2nd of 2 in the 70 and over age group.