Long Run Sunday - 16 miles

Today was a 16 mile long run.  The weather was delightful for the end of July in St. Louis.  Kathy and I started out at 8 am.  We ran the 16 miles in 3:02 which was a 11:24 pace.  Last week we ran 16 miles is 3:09 which was an 11:50 pace.  Last week started out at a 4/1 walk run then did the last half of the workout at 3/2.  This week we ran the whole workout at 4/1.  It seems like there should have been a bigger difference in time. We did do more elevation this week.  I just feel slow.