Half Marathon races near Slough

Slough Base Miles

Slough hosts 208 Half Marathon races in 2026 within 80 km of the city centre — upcoming dates, recurring series, and other races nearby, all in one place.

Locals get plenty done from Upton Court park, especially on the Upton Court parkrun course. The course is almost completely flat and consists of two laps, so it suits steady Z2, sharp intervals, and a tidy Saturday hit-out. Underfoot is approximately two-thirds grass and a third tarmac, and the grass underfoot is lovely to run on. Runners get a fantastic view of Windsor Castle in the distance and a few twisty corners near the end. GoodGym Slough meets every Monday from Salt Hill Activity Centre, and runners run back all within 90 minutes. Jubilee River Races and UK Ekiden give the town proper anchor events.

Slough Cycling Club gives locals a clear home base, with over 50 members and Sunday Club rides for riders comfortable at at least 40 miles. The club rides at around 14 mph, and the vibe is strictly no-drop, so no one gets left behind. National Cycle Route 61 passes through town, and the borough works well for base miles because most of it sits within a 20 minute ride of the town centre. Riders use the flat lanes for tempo, tri prep, and gran fondo legs. The climbs sit away from town toward High Wycombe, while Windsor, Maidenhead, and Reading keep longer days honest.

July suits Slough best, because this part of the Thames Valley often gets the warmest daytime summer temperatures in the British Isles. Summer afternoons can hit 30°C, so locals start earlier, carry drink, and keep Z2 honest before the heat builds. Summer runners lean on Upton Court park, the Thames path, and the Jubilee River, while cyclists stretch out toward Windsor and beyond. Winter changes the feel more than the map, with grass getting softer, tarmac becoming the safer call, and club miles turning steadier. Rainfall stays low compared with most of the British Isles, but 105 days still report over 1 mm of rain.