This isn't real. If you ran a 4:02 and 8:56 and could only manage 17:30 in a legit XC race, there's something else going on. Especially because the distances you listed make this seem like high school and you said it was 20 years ago. So. No.
Also, if when you got to college and you saw that this discrepancy get more extreme, that's also less likely.
Learn to read bro the guy noted he ran 16:00 but averaged in the 17's. This could mean he improved through the season and ended the season faster than he started. It is also pretty normal to not be a great XC runner but a phenomenal track athlete. I knew guys in college that ran 28:00's and 29:00's for 8k but ran 1:46-3:40 on the track. We had a sub 4:00 miler on my team but the guy could barely run sub 27 on the track.
Had the same problem in college. I grew and my body changed. Became long and lean. Never could figure it out or understand it but I realized later it was the surface and the turns.... I was a "rhythm" runner and didn't like the turns or the soft surface.... Not sure you can really fix that but accepting that you are better on the track is a start. With that said I would practice running on the grass and practice tight turns... You can get better, but I doubt you will ever duplicate your track success. Best of luck, you have a lot of running and racing ahead of you.
Had the same problem in college. I grew and my body changed. Became long and lean. Never could figure it out or understand it but I realized later it was the surface and the turns.... I was a "rhythm" runner and didn't like the turns or the soft surface.... Not sure you can really fix that but accepting that you are better on the track is a start. With that said I would practice running on the grass and practice tight turns... You can get better, but I doubt you will ever duplicate your track success. Best of luck, you have a lot of running and racing ahead of you.
People here are nuts. How fast do you expect a 9:50 3200m guy to run over a 5k XC course? Does anyone really expect to be much faster than 16:20? People are go crazy talking about energy return, hills, and the rest. The answer is simply a 9:50 guy runs around 16:20.
yeah that sea level performance is better but he is racing XC at altitude. The 3200m at altitude matters a lot more…