You can design your 5050OCF challenge any way you'd like, but the basic idea is to get sponsored for covering a 50k distance (any way you like) over the month of July.

We are the national charity for Oesophageal Cancer in Ireland; bringing the good fight to a bad cancer. We aim to increase awareness of related symptoms to promote early diagnosis, raise funds for breakthrough research, and help improve the outcomes of anyone living with this difficult cancer.