Website:

This docs has the 4 week challenge on it:

Week 1: To go for the most bike rides:
https://docs.google.com/document/d/1B6dG0wbwtnpVRjyVclVjIPNfyLnE3TYB73fnORTNzhs/edit 

Week 2: Get the most people out cyling with you:
https://docs.google.com/document/d/1d7hmIy2mkHJbYohzke8kzlYPtTeDqt1nT_qtVn0J9lM/edit

Week 3: Most km


Week 4: