Now that we have GPXplore, it would be great to be able to customize the segment of a route that the event will take place on. We can currently set laps or total distance, but all routes start at the beginning of the gpx file. However, if we are preparing for an event, we may only want to use a certain segment of the route. Being able to specify both a starting distance and a total distance would accomplish this and allow users to have one gpx file but choose which portions of it to train on.