Saturn Running - Midweek Chasing Numbers

JUL
3
2026
Choose your own distance in this flexible 7-hour time challenge along the River Thames. Start anytime between morning and afternoon and run a scenic, signed lap course. All finishers get a medal, goody bag, and access to a well-stocked aid station.
7 hour 50 kilometers Marathon Half Marathon 10 kilometers 5 kilometers

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Event Format

This is a 7-hour time challenge event. Participants can start at any time between 7:30 AM and 3:30 PM. They have full control over the distance they run, with a minimum of 3 km. The event uses a lap-based course where a full lap is approximately 4.37 miles (7 km). Participants can run as many laps as they wish within the time limit, subject to UK Athletics age restrictions.

The event offers multiple official distance achievements:

  • 3 km – Minimum to be an official finisher.
  • Half Marathon – Achieved by completing 3 laps.
  • Marathon – Achieved by completing 6 laps.
  • 50 km and Ultra Marathon – Achieved by completing 7 or more laps.

Course

The route follows a stretch of the River Thames near Egham. The course is fully signed. The surface is mixed, with approximately 60% on well-made paths or tarmac and the remainder on grass and light trail, which can get muddy. Road shoes can be used year-round.

Venue and Facilities

The event is based at the Wraysbury Skiff and Punting Club in Egham. On-site facilities include toilets, changing facilities, and a cafe. There is a large "pay on exit" car park at Runnymede Pleasure Grounds. An unmanned bag drop is available at the start/finish area.

Included with Entry

All finishers who complete at least 3 km receive a medal and a goody bag (with a vegan option available). An aid station at the start/finish of each lap provides drinks, savoury and sweet snacks, fruit, and cheese. Distance pins for the half marathon, marathon, 50 km, and ultra are awarded and attached to the medal ribbon. Participants celebrating a milestone run (e.g., 50th, 100th event) can request a personalized race number. Visit the organization's website for the most recent information.

7 hr
Time Challenge
50 km
Marathon
Marathon
Half Marathon
Half Marathon
10 km
5 km
Ultra Marathon