graeme wrote:The London marathon. (Do I win a coconut?)
As far as I can see, they don't: the different routes start at different times, and so each is hence a separate race from the other routes.
greywolf wrote:Orienteering: when the first starters are faced with a "virgin" forest and the last starters get to run in a forest with tracks between the controls.
I totally accept what you are saying about the nature of the course potentially changing and the impact that can have (and that does happen in other sports, who equally try to cater for the change), but the actual course remains the same.