Track races provide an ideal opportunity to cover as much ground as possible on a flat, sympathetic surface. One aid table is easier to maintain, although demand is high and constant, than dealing with the logistics of providing warm nourishment miles from anywhere in places inaccesible to vehicles. Some events for example,24 hour races, even allow for vehicles to be parked trackside enabling the creature comforts to be brought to the race.
Most track races do not excede the 48-72 hour range due to the tedium encountered beyond this distance.* Ultramarathon