>I think this "addition" of complexities needs to be treated as totally new course each time such addition is made.
I'm a trail runner and this isn't done, probably because conditions are always different year to year, so a modified route is just another misc change along with weather conditions which arguably would introduce more variance. Courses vary slightly all the time, due to trail conditions, environment and permit/access issues, plus minor rerouting around trail sections that are damaged or under repair, etc.
Western States, probably the most famous trail ultra, has had several minor route changes (due to fires, floods, snow, etc) in its history. They do not keep separate records for every variation of the route. Even Leadville rerouted the turnaround last year, which caused some confusion (including Krar technically going off course before regaining the route).
In the case of Barkley, the event is already pathologically designed so making it slightly tougher after each finisher is one of the quirks of the event. Nobody runs Barkley for time, just finishing is a huge deal (hence 14 or whatever finishers in 30 years). Heck, just completing the "fun run" (3 laps within the time limit) yields bragging rights, among trail runners at least. ;)
I'm a trail runner and this isn't done, probably because conditions are always different year to year, so a modified route is just another misc change along with weather conditions which arguably would introduce more variance. Courses vary slightly all the time, due to trail conditions, environment and permit/access issues, plus minor rerouting around trail sections that are damaged or under repair, etc.
Western States, probably the most famous trail ultra, has had several minor route changes (due to fires, floods, snow, etc) in its history. They do not keep separate records for every variation of the route. Even Leadville rerouted the turnaround last year, which caused some confusion (including Krar technically going off course before regaining the route).
In the case of Barkley, the event is already pathologically designed so making it slightly tougher after each finisher is one of the quirks of the event. Nobody runs Barkley for time, just finishing is a huge deal (hence 14 or whatever finishers in 30 years). Heck, just completing the "fun run" (3 laps within the time limit) yields bragging rights, among trail runners at least. ;)
EDIT: grammar