Ha, good point, maybe the horse cannot run for 24h non-stop when that would be possible for a human. Nevertheless if a horse can cover 100 miles in ~6 hours, he

Ha, good point, maybe the horse cannot run for 24h non-stop when that would be possible for a human. Nevertheless if a horse can cover 100 miles in ~6 hours, he still has 18 hours for the remaining 80 miles, so allowing him to rest (which is also pretty common in some human ultra-trails) I'm pretty sure the horse could still beat the human record of 180 miles in 24 hours.