Thames Path 100

Thames Path 100

The Thames Path 100 is a continuous 100 mile (161 km) point-to-point trail race following the Thames Path from Richmond in south-west London to the centre of Oxford. The course has approximately 1900 ft (560 m) of climb, is marked for navigation, and consists of about 25% paved surfaces and 75% trail, with many groomed paths and paved towpaths along riverside scenery. The event is held under a UKA permit through the Trail Running Association and is the 16th annual edition.

Key event details include a 30 hour overall cut-off, an entry fee of £225 (£227 for unaffiliated runners), and a field of around 300 starters. Entries for the 2027 race open on 31 May 2026. To enter runners must have completed a minimum 50 mile race within 15 hours between 1 January 2020 and race day; unqualified applicants may be contacted by organisers to verify plans.

The course will have at least twelve aid stations offering a range of food and drinks, with hot drinks available from Hurley onwards and hot food at Henley, Goring and the finish. Drop bags are accepted for selected aid stations and the finish; individual bag size limits apply. Pacers are permitted from the 51 mile aid station at Henley, on foot only, and only one pacer may accompany a runner at a time. Crews and pacers may only meet runners at listed points.

Course markings include National Trail posts and event ribbons; there are several road crossings that are not marshalled. A medical team is available throughout the event, and runners should follow emergency procedures if needed. Mandatory kit is required at all times and includes a charged mobile phone, water capacity of at least 1 litre, a survival blanket, a waterproof jacket with sealed seams, a whistle, a primary and backup light each of minimum 100 lumens, warm hat and gloves, a long-sleeved base layer kept dry, and a cup. A one hour time penalty applies if mandatory items are missing. Visit the organization's website for the most recent information.