River Thames Half Marathon

River Thames Half Marathon 2027 Course Analysis

River Thames Half Marathon is a half marathon held in Walton-on-Thames, United Kingdom. It is scheduled for Monday 28 June 2027. The course is run on mixed surface with 23m of total climbing, with its high point near 22m above sea level. For registration and full race details, visit the official River Thames Half Marathon website.

Elevation Profile

This is a very flat course, with only 23m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.

Expected Race Day Weather

Based on historical weather data for June, the expected race day conditions are as follows. Moderate temperatures between 17°C and 25°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a low chance of rain (18%), so dry conditions are likely.

Surface Type: Mixed

River Thames Half Marathon features a mixed-surface course, combining sections of road with unpaved terrain such as gravel paths, parkland, or boardwalks. Mixed courses add variety but also introduce some unpredictability in footing. Expect slightly slower times than on a pure road course, and road-trail hybrid shoes may be the best footwear option.

Looking for an easier marathon or a tougher challenge? You can also compare River Thames Half Marathon against other half marathons to find the right race for your goals.