De Batavierenrace is the biggest relay race in the world from Nijmegen to Enschede and this year will be the 45th edition! The party at the end of the activity is the biggest party for students in the Benelux, this would already be a good enough reason to participate.
Obviously you'll have to run, but next to that is also very much fun. If the team is complete you are too late, so better get those tickets fast! The price for this weekend will be around the 37 euro.