THAMES TRAIL ULTRA

Thames Trail Ultra: A 47-Mile Journey Along England's Majestic River Thames
Embark on an extraordinary ultra-marathon journey along the picturesque Thames Path, stretching from Iffley near Oxford to Henley-on-Thames. This renowned event, previously known as the Thames Trot, is a must-do for endurance runners seeking both scenic beauty and challenging terrain.
The course offers 47 miles of varied landscapes, including smooth tarmac paths and muddy trails alongside the majestic River Thames. Runners will pass through charming villages, historic houses, and traditional rowing clubs, providing an immersive experience that every participant will cherish long after crossing the finish line.
In addition to its scenic allure, the Thames Trail Ultra is recognized as a UTMB Index Race in the 50K category. This prestigious status means that completing this race earns runners valuable points towards their overall UTMB index score—a significant achievement for ultra-runners worldwide.
For the upcoming edition on October 25th, 2025, new additions include a finish line at Henley-on-Thames's YMCA Y Centre, offering hot food, showers, and changing facilities to help runners unwind after their long journey. The race also features five aid stations equipped with water, snacks, and the famous Go Beyond fruitcake, ensuring that participants remain well-fueled throughout.
Prizes for top male and female finishers include trophies, while all competitors receive a medal and exclusive merchandise commemorating their achievement. To capture your epic adventure, consider purchasing a Race Day Print of your journey.
The event starts at 8:15 AM with registration beginning at 7:00 AM. The entry fee includes real-time GPS tracking via Geo Tracks, allowing friends and family to follow runners' progress online or through the mobile app.
Runners must navigate approximately 40.4 miles (86%) of cross-country trails and riverside paths alongside 6.6 miles (14%) of roads. Total elevation gain is +947 feet (+289m) with a loss of -1053 feet (-321m), culminating in an overall cut-off time of 11.5 hours.
Key course highlights include the Thames Path and Ridgeway National Trails, though runners should note that the Donkey Bridge near Henley is off-limits due to structural issues this year. Instead, a simple diversion will guide participants around it safely. Additionally, the Benson Weir footway is closed; however, clear markings on GPS trackers and GPX files ensure easy navigation.
Mandatory kit includes items such as fully charged mobile phones with race director contacts, power banks for recharging devices, water bottles or bladders (minimum 1L capacity), survival blankets, waterproof jackets, whistles, headtorches or body torches with spare batteries, hats and gloves, long-sleeved base layers or fleeces, debit/credit cards for emergencies, and trail shoes recommended due to varied terrain.
Baggage transfer services are available from the start to finish line, ensuring runners have a warm change of clothes waiting at Henley-on-Thames. Accommodation options range from Airbnb rentals to hotels near Iffley and Oxford train station courtesy shuttle buses for those traveling by rail or car.
Don't miss this iconic challenge along one of England's most celebrated rivers—register now and join the ranks of runners who have found unforgettable adventure on the Thames Trail Ultra.
For more information, visit our website or contact us directly to secure your spot in what promises to be an unforgettable ultra-marathon experience.