Boxing Day Challenge

A six-hour timed running challenge on a flat River Thames out-and-back course, with multiple distance options from 5K to ultra and regular fuel stations.

The Boxing Day Challenge is a six-hour timed event on a flat, riverside out-and-back course along the River Thames. Participants can choose a distance from 5K up to an ultra marathon, with a fuel station at the end of each lap and a bespoke medal and goody bag on completion.

Date: Sat 26 Dec 2026
Start time: 07.00am
Event format: 6-hour challenge with a 3.28-mile lap (out-and-back); the last lap can be started up until 5:59:59.

Races and pricing:

• 5K (Age 12+) – £16 - £18
• 10K (Age 16+) – £20 - £22
• Half Marathon (Age 17+) – £33 - £35
• Marathon (Age 18+) – £33 - £35
• Ultra Marathon (Age 20+) – £33 - £35
• 6 Hour Challenge (Age 18+) – £33 - £35

Timetable:
06.30am registration opens
07.00am event starts

Mandatory kit: head torch due to the early start.