Ride repeats on your local hill or go for a huge mountain adventure - however you do it, climb at least 8,848 meters over as many rides as you like to complete the Challenge. You'll get a WERC Medal plus climbing-ready legs! Challenge Start Date: 29th November End Date : 19th December. Midnight. Terms: Join this group to take part in the challenge. No limit on number of rides during the challenge period. Rides on trainers not allowed. All rides to be self-propelled. E-bikes and assisted rides not allowed.