Crothian said:Well, long distance races can and usually are very dangerious for the mounts. You could have mounts designed for long distance with the Endurance feat and a higher then usualy Con. You could also have each character with multiple mounts, so the one they ride tires, they switrch to another mount.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.