Run Barns Green is an annual running event held in the West Sussex countryside near Horsham. It features a half marathon, 10K, 5K, and the Jennings Junior Jog for children. The 5K begins the day, followed by the half marathon and 10K. The Kids Colour Run takes place later, around lunchtime. This event is structured as a family day rather than a single-distance race, allowing adults to choose a competitive road distance while younger runners have their own dedicated activity.
The routes traverse the rural lanes surrounding Barns Green, contributing to the event's village-race atmosphere close to Horsham. Local charities are integral to the race's mission, with St Catherine's Hospice being one of the associated charity partners. The race is operated entirely by volunteers. Runners have consistently rated the event highly on Racecheck; the half marathon was once ranked fourth in the UK by this review site.