The whole route does not have to be the same. I could run a different route at a different time on a different day from you, but for one section of our runs we may take the same line up a hill. This will appear in the league table.
I will be able to see the rest of your run & see if you did a short run to deliberately make an attempt to climb up the table.
If you are using Strava, particularly forthe cycle option, it is worth noting that you can use a privacy setting that doesn't show where you start/finished your ride. You don't want someone coming around to your garage & nicking your bike, do you?