Like Laurie I measure the splits in a third ride after the two certification rides. I usually do a fourth ride to document split
locations, measuring their distances from landmarks.
After a two certification rides, I measured kilometer splits for an 8 K race in August. I didn't have time to measure mile splits and recommended that the race director not have
inaccurate mile splits. The race had no mile splits.
I measure races for certification mainly to get certified races nearby that I can run. I am still competetive locally in my age group.
Dale Summers