The Longbridge 100 Backyard Ultra's

JAN
22
2027
A backyard ultra in Alfriston where runners start a new lap on the hour until one runner can start an extra lap; each loop is about 4.2 miles on mixed trails.
Fri 22 Jan 2027
Backyard Ultra Loop

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The Longbridge 100 Backyard Ultra

The Longbridge 100 is a backyard ultra held in Alfriston with winter and summer editions. The event is a last person standing format in which runners must begin a new lap on the hour, every hour; the race ends only when a single runner can start one more lap than any other.

The course is a loop of 4.2 miles (6.78 km) over single paths and farm access roads with chalky flint and gravel underfoot. Winter and summer routes have reported elevations of 180 m and 190 m respectively. Completing multiple laps accumulates distance: four laps equal a half marathon, seven laps a marathon, and eight or more laps qualify as an ultra.

Race procedures specify a fixed starting corral that must be occupied at the bell to continue. Each loop must be completed within one hour. Competitors may not leave the course during a lap except for restroom visits. No personal aid is allowed during a lap; assistance is permitted only between finishing a lap and entering the starting corral for the next lap. Runners must wear a watch to record loops and cumulative distance. Trekking poles and other artificial aids are not permitted.

A token system requires each runner to pick up a token at the second turnaround and return it to race HQ every lap; failure to return a token leads to disqualification. Timing uses a Webscorer app plus manual records.

Entry is limited (maximum 50 per race). Entries include access to covered barns, an aid station with water, fruit and snacks, first aid provision, toilet and changing facilities, and bespoke mementos for finishers and DNFers. Refund and deferral rules apply, including specific conditions for sold-out events and pregnancy-related deferral. Visit the organization's website for the most recent information.

4 mi
Backyard Ultra Loop

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