Thames Ring Series

A series of ultra-distance trail races around the Thames, Grand Union and Oxford canals, offering 100, 150 and 250-mile options from Streatley-on-Thames near Reading.

Thames Ring Series is a set of legendary ultra-distance trail races following rivers and canals on an anti-clockwise loop through countryside and historic towns, with a 100-hour time limit for the longest option. Runners start from Morrell Rooms in Streatley-on-Thames near Reading.

Dates: Wed 21 Apr 2027 to Sun 25 Apr 2027

Races and start times:

• TR150 (150 miles) – Wed 21 Apr 2027, 10.00am
• TR250 (250 miles) – Wed 21 Apr 2027, 10.00am
• TR100 (100 miles) – Fri 23 Apr 2027, 12.00pm

Event HQ:
Morrell Rooms, Church Lane, High Street, Streatley, Reading, Berkshire, RG8 9JA, UK

Facilities/support: checkpoints with food and drink, dropbag transfers (varies by distance), changing and toilets at start/finish and some checkpoints; cut-offs strictly enforced.