Someone who enjoys running wrote:
For what its worth, my high school had worthless sprinters, so we had a 4x4 composed entirely of XC men that could do like 3:20. Of course we would run hard quarters all cross country season (often ending with a few sub 60s), and even the occasional 200, so that might make a difference.
I don't buy this. I would have bought it if you said "3:30" but a 3:20 makes you sound like you are talking out of your ass. A 3:20 4 x 4 would equate to an average of 50s per 400m. All off of hs xc runners? That means you had 4 D1 scholarship guys on your xc team? Were you Mead in the early 90's? Oh wait... they couldn't even do that with the two Davis brothers, James and Autry!!! Shoot man, I was a D1 scholarship guy with multi state awards in HS, I had top 3 times in the state in 400m (3) (not the strongest state for sprinters), 800m (1), 1,500m (1), 3,000m (2) and xc (3) my senior year and I could only run 50.x in the open 4. So I wouldn't even have been on your hs xc 4 x 4 team? I don't think so. No freaking way you had 4 xc guys faster than me in the open 4 on one team. Like I said, during Mead's powerhouse days of the early 90's they couldn't even do a 3:20 flat with xc guys and they went something like 1, 2, 3, 5? (I'm probably wrong here) in xc at state!
Back to the OP. Running xc won't hurt your track season. It more than likely will help you in that you'll have more stamina to withstand more repeats in practice come Winter/Spring training.