Here is a simple methodology to determine how “slow” a cross-country course is relative to a track 5k (or similarly, for a track 10k distance):
(1) Take a broad data-set of athlete times recently run on a cross-country course (example, athlete finishing times from SEC Conference Championship on 10/27/23).
(2) For each male athlete, plug their 8k time into Jack Daniels Calculator to determine what their “equivalent” 5k (or 10k) time would be on that course (in similar conditions).
(3) Subtract the athlete’s 5k track PB from the 5k cross-country course “equivalent”; the “difference” is essentially how much slower the course was relative to that athlete’s track PB.
(4) Repeat step (3) for each athlete, then average all of the “differences” to get a rough average of how “slow” the course was relative to the track.
This method would be more accurate for seasoned collegiate athletes that are not changing their PB’s as rapidly as high-schoolers from year-to-year.