The Longbridge 100 Backyard Ultra's

Event overview

The Longbridge 100 Backyard Ultra is a last-person-standing loop race held in Alfriston with winter and summer editions. The format requires runners to begin a new lap on the hour, every hour, and the race ends when only one runner starts a lap more than anyone else. Entry is limited (maximum 50 per race). A Summer 2026 Silver Ticket edition offers 40 general-sale spaces plus 10 reserved for a waiting-list ballot. Entry prices range roughly between £100 and £140. Entrants must be aged 21 or over on the event date.

Course, rules and timing

Each lap is approximately 4.2 miles (6.78 km) and runs on a mix of single paths and farm access roads with chalky flint and gravel underfoot. Each loop must be completed within one hour to count. Runners must be inside the starting corral when the lap begins and may not leave the course during a loop except for restrooms. No personal aid is allowed while a lap is underway; assistance is permitted only between finishing one lap and entering the corral for the next. No artificial aids are allowed. All runners must wear a running watch to record laps.

Race systems and on-site services

Timing uses a Webscorer app with manual backup. A token must be collected at turnaround point two on every lap and returned to race HQ each loop; failure to return a token results in disqualification. On-site services include an aid station with water, bananas and snacks, a daytime cafe adjacent to the corral, covered barn space for runners and support crew, toilets and separate female changing areas, first aid cover and charging power. Refund and deferral rules apply depending on timing and waiting-list status. The event has multiple sustainability measures such as being single-use-plastic free, reusable bibs, local sourcing, renewable energy where feasible and shuttle transfers by electric minibus. Visit the organization's website for the most recent information.