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Thames Ring 250

Streatley, United Kingdom • 23 Apr 2025

The Thames Ring 250 is an iconic 250+ mile ultramarathon that takes participants on a challenging loop from Goring along the River Thames into London, up the Grand Union Canal, and back down the Oxford Canal. First held in 2009, this race features a high difficulty level, with a DNF rate exceeding 55%. Runners have 100 hours to complete the course, with well-stocked checkpoints every 25 miles. The event includes tracking, first aid support, and optional merchandise. Finishers receive a unique and heavy medal, making it a memorable achievement for all participants. Visit the organization's website for the most recent information.

United Kingdom East of England Streatley

Race information

Registration
250 mi
250 Miles
Visit the organization's website for the most recent information.
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