Yellow Belly Ultras | Trail Running & Ultra Marathons in Lincolnshire

Welcome to yellow belly ultras

Discover the raw beauty of Lincolnshire through our diverse range of ultra marathons and trail running events. From scenic routes winding through the Lincolnshire Wolds to the ultimate endurance test of our Backyard Ultra, we provide the challenges, and you bring the grit. But we are more than just race day, we are a community. Join us for our free social trail runs throughout the year and experience the ethos that drives us "Always one step further".

More about us

Summer 50 Miler

Sat, 12th Sep 2026

50 Miles

Swallow Village Hall. Lincolnshire LN7 6DL

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Lunacy Obstacle Race

Sun, 18th Oct 2026

10K

Chalk Farm, Salters Lane, Wyham, Louth, Lincolnshire, DN36 5RS

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Tabbed In The Head

Sun, 13th Dec 2026

15 Miles

Clickem Inn, Swinhope Nr, Binbrook, Market Rasen, LN8 6BS

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Winter 50 Miler

Sat, 20th Feb 2027

50 Miles

Swallow Village Hall. Lincolnshire LN7 6DL

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Yellow Belly 100

Sat, 27th Mar 2027

100 Miles

Swallow Village Hall. Lincolnshire LN7 6DL

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Backyard Ultra

Sat, 22nd May 2027

Backyard Ultra

Chalk Farm, Salters Lane, Wyham, Louth, Lincolnshire, DN36 5RS

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What our runners say

I'm a huge fan of the Yellow Belly ultramarathon and trail races. they're exactly what a trail event should be, raw and authentic without feeling over commercialised! The organisation was spot on and there's a genuinely supportive community feel from start to finish.

Ash

I’ve taken part in several ultra marathons put on by different organisers, and they’ve all been great in their own way. But something about Yellow Belly Ultra events really stood out. They’re local, and they showcase some of the incredible trails the Lincolnshire Wolds have to offer. These events have everything that matters: beautiful scenery, challenging routes, great organisation, fantastic support and, of course, those big, brilliantly designed medals!

Phil

Yellow Belly FAQs

Are all yellow belly events in Lincolnshire?

Our ultra marathons and trail races take place primarily in the beautiful Lincolnshire Wolds, an Area of Outstanding Natural Beauty (AONB). While many people think Lincolnshire is entirely flat, our routes often feature rolling hills, scenic woodlands, and historic trails like the Viking Way. We are proud to showcase the best trail running in Lincolnshire, offering terrain that challenges experienced runners while remaining accessible for newcomers.

Are your ultra marathons suitable for beginners?

Absolutely. We pride ourselves on organising beginner-friendly ultramarathons. Whether you are attempting your first 50 miler or stepping up to a longer distance, we design our events with generous cut-off times to remove the pressure. The Yellow Belly spirit is all about community and support, you will never be just a number at our races.

Why is the company called Yellow Belly Ultras?

Yellowbelly is a traditional nickname for a person born in Lincolnshire. By naming our series Yellow Belly Ultras, we are celebrating our local heritage and the unique landscape of our home county. When you run with us, you are not just running a race, you are experiencing the heart of Lincolnshire culture.

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