100 miles along the Thames from London to the dreaming spires of Oxford
The Thames Path 100 is a 100-mile point-to-point trail race following the River Thames from Richmond in South West London to Oxford, organized by Centurion Running. The course traces the nationally-recognized Thames Path National Trail against the river's current, threading through riverside meadows, historic market towns, and quintessential English countryside. With only 1,900 feet of total elevation gain, the route is exceptionally flat for a 100-miler, making it one of the fastest such courses in the UK. Runners pass through Windsor, Henley-on-Thames, Reading, Wallingford, and a string of charming Oxfordshire villages before finishing in the grounds of Queen's College, Oxford University. The race starts at 9am on Saturday and most runners will experience a full English night on the trail before arriving in Oxford.
Some ultra experience recommended
Richmond, England, United KingdomMay 02, 2026
Must complete a 50 Mile race or longer within the qualification window
Qualifying window: January 01, 2020 – May 02, 2026
Must have completed a minimum 50 mile distance race within 15 hours, between 1st January 2020 and race day. Unqualified runners may enter but will be contacted approximately 8 weeks prior to race day.
| Location | km | Elevation |
|---|---|---|
Richmond Start | 0.0 | 11 m |
Walton On Thames Aid Station | 16.9 | 8 m |
Wraysbury Aid Station | 35.4 | 17 m |
Boveney Aid Station | 48.9 | 20 m |
Cookham Aid Station | 61.2 | 25 m |
Hurley Aid Station | 70.8 | 29 m |
Henley Aid Station | 82.1 | 31 m |
Reading Aid Station | 93.3 | 36 m |
Pangbourne Aid Station | 107.2 | 41 m |
Goring Aid Station | 113.9 | 46 m |
Wallingford Aid Station | 124.7 | 50 m |
Clifton Hampden Aid Station | 136.8 | 55 m |
Lower Radley Aid Station | 152.9 | 51 m |
Oxford Finish | 160.9 | 56 m |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
May in the Thames Valley brings typical English spring weather — variable and unpredictable. Expect average daytime highs around 17°C with an average humidity of 80% and roughly 60mm of rainfall across the month. Conditions can swing from sunshine and warm afternoons to heavy rain and cold overnight lows. Nights drop significantly, requiring warm layers for the dark hours. Trails can become muddy in wet conditions, particularly in the final 30 miles.
May weather in the Thames Valley can include everything from sunshine to heavy rain, wind, and cold overnight lows. Be prepared for all conditions.
Average rainfall of 60mm with 80% humidity. Trail sections can become muddy in wet conditions, especially in the second half of the course.
No recommended gear specified
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