Leigh-on-Sea Running Festival 2026

Welcome to the LOS Run Fest

 – a brand-new running festival in Leigh-on-Sea.

Choose from a 5K, 10K or Half Marathon and experience stunning coastal scenery, an exciting event atmosphere and professional race organisation from start to finish.

Whether you're chasing a personal best, taking on your first race or simply enjoying the day, the LOS Run Fest brings runners of all abilities together for an unforgettable festival of running.

*Brand-New Course*

Whilst the event shares a small section with the Leigh-on-Sea 10K Classic, the majority of the route is completely new, taking runners on a fresh journey through Leigh-on-Sea.

Whether you ran the Classic or not, expect a completely different race-day experience.

Choose Your Distance

5K

Perfect for beginners, first-time racers, juniors (minimum age subject to event rules), parkrunners or anyone looking for a fun and achievable challenge.

*10K

A predominantly brand-new route offering a fast and scenic challenge for runners chasing a PB or simply enjoying a fantastic race-day experience.

Half Marathon

Take on the ultimate challenge of the day with an extended coastal route showcasing even more of Leigh-on-Sea. Ideal for first-time half marathon runners and experienced athletes alike.

Every Entry Includes

- Bespoke LOS Run Fest finisher medal

- Chip timing

- Music and event village

- Professional event photography

Race Bib Collection/Registration

To help make race morning as smooth and stress-free as possible, race bib collection will take place in the days leading up to the event.  We ask all local runners to collect their race bib in advance.  Don't worry if you're travelling from further afield or genuinely can't make the pre-event collection dates — race-day collection will be available by prior arrangement.  Full collection dates, times and instructions will be confirmed to all entrants before race day.

Course Routes

Explore the planned routes for each LOS Run Fest distance. Routes are subject to change.

Event Information

Final race information, timings and race-day instructions, will be emailed to all entrants during race week.