Ealing Half Marathon covers 13.1 miles through closed streets and green spaces of west London, starting and finishing in Lammas Park. The event sold out all 4,650 places in its first year, so expect the starting grid for this second edition to fill up fast. While most run for fun, there are various prizes up for grabs in numerous classifications, including a competition for the fastest Ealing resident. Wherever you finish, you'll get a medal and an 'e-goody bag', containing offers from local businesses sponsoring the event. For full details see ealinghalfmarathon.com.