Half marathons in United Kingdom — September 2026

31 upcoming half marathons in United Kingdom during September 2026.

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This calendar currently lists 31 upcoming events, from Sep 6, 2026 to Sep 28, 2026. September is the busiest month, with 31 events scheduled. Events are spread across 28 different locations; London hosts the most (3). Course distances range from 10.2 km to 21.1 km.