The Longbridge 100 Backyard Ultra's

The Longbridge 100 Backyard Ultra

The Longbridge 100 is a backyard ultra held at Longbridge Farm Barns near Alfriston. It is a last-person-standing format in which competitors must start a new lap on the hour, every hour; the race ends only when one runner is able to start a lap that no one else can match.

Each lap is at least 4.167 miles in length and follows the same route every time. The course runs on a mix of singletrack and farm access roads with chalky flint and gravel underfoot. The Winter route has 180 m of elevation and the Summer route 190 m.

Race rules require runners to be inside a fixed starting corral when the bell rings for each lap; failure to do so results in a DNF. Loops must be completed within the hour. Competitors may not leave the course during a loop except to use restrooms, and no personal aid or non-competitors are allowed on the course during a lap. Artificial aids are prohibited. All runners must wear a running watch to record laps.

A token system at the second turnaround requires each runner to collect a token and return it to race HQ each loop; missing a token leads to disqualification. Lap times are recorded using the Webscorer app and by manual backup.

Entries are limited (maximum 50). The event provides a covered barn area for runners and support crews, a small aid station with drinks and snacks, onsite first aid, separate female changing facilities, power for charging, and bespoke mementos for finishers and DNF participants. The organiser follows a range of sustainability measures including single-use plastic reduction, refill stations, recycled signage, local sourcing, electric shuttles, solar charging where feasible, and carbon offset initiatives. Visit the organization's website for the most recent information.