Each race course has a route profile and when possible I am going to add details of these routes here. Coupled with the Big Percent value for each race I am hoping to identify what affects the average times for a race,

I am considering that these factors affect the course speed.... but by how much (that is where the sums and all the course data comes into this): Start height above sea level, overall Height gained / lost, end height above sea level, number of hills, direction, (race surface), number of laps, direction run, exposed or sheltered route.