Ring O’ Fire
Distance: 130 Miles
Elevation: 4,000M
Location: Holyhead, North Wales
Date: Fri, 4th Sep 2026
UK ULTRA MARATHON CALENDAR
Welcome to the definitive guide for ultramarathon events across the UK in 2026 - 2027! Whether you're a seasoned ultra-runner looking for your next epic challenge or an aspiring athlete ready to tackle your first long-distance race, you've come to the right place.
With more than 120 of the top UK ultra running events listed, this comprehensive ultra marathon calendar makes it easy to discover races across England, Scotland, and Wales. From gruelling 100 mile challenges through national parks to scenic 50km routes along coastal paths, I've curated a diverse selection to help you find the perfect event!
35 events found
Map ViewMulti Day
50 Miles
Snowdon Ultra 50
Distance: 45 Miles
Elevation: 3,254M
Location: Snowdonia Eryri
Date: Sat, 5th Sep 2026
100 Miles
Snowdon Ultra 100
Distance: 102 Miles
Elevation: 5,788M
Location: Snowdonia Eryri
Date: Sat, 5th Sep 2026
50 KM
Snowdonia Sea2Sky 50K
Distance: 54.2KM
Elevation: 1,632M
Location: Bath House, Barmouth
Date: Sat, 5th Sep 2026
50 KM
RIDUM 50K
Distance: 50KM
Elevation: 1,340M
Location: Parc Penalta, Wales
Date: Sat, 5th Sep 2026
Multi Day
Dragons Back Race
Distance: 380KM
Elevation: 17,400M
Location: Conwy, North Wales
Date: Mon, 7th Sep 2026
Back Yard Ultra
Trails & Tarmac Summer Back Yard Ultra
Distance: Unlimited
Elevation: 86M
Location: Crickhowell, Wales
Date: Sat, 19th Sep 2026
50 KM
The Loop 50K Ultra
Distance: 50KM
Elevation: 1,480M
Location: Camp Plas, Wales
Date: Sat, 10th Oct 2026
Multi Day
Race Across Wales
Distance: 228KM
Elevation: 6,289M
Location: Greenfield, Wales
Date: Fri, 16th Oct 2026
50 KM
Endurance Life Gower 50K
Distance: 55KM
Elevation: 1,180M
Location: Oxwich Bay, South Wales
Date: Sat, 7th Nov 2026
50 Miles
Ultra Tour of the Quarries
Distance: 50 Miles
Elevation: 2,300M
Location: Porth Penrhyn, Wales
Date: Sat, 14th Nov 2026
100 Miles
Slate Trail Ultra
Distance: 91 Miles
Elevation: 3,900M
Location: Porth Penrhyn, Wales
Date: Sat, 14th Nov 2026
50 Miles
Winter Run to the Castle
Distance: 42 Miles
Elevation: 893M
Location: Aberdovey, Wales
Date: Sat, 16th Jan 2027
Back Yard Ultra
Trails & Tarmac Winter Back Yard Ultra
Distance: Unlimited
Elevation: 86M
Location: Crickhowell, Wales
Date: Sat, 6th Feb 2027
50 Miles
Brecon to Cardiff Classic Ultra
Distance: 43 Miles
Elevation: 1,200M
Location: Brecon, Wales
Date: Sun, 14th Feb 2027
50 Miles
Brecon to Cardiff Xtreme Ultra
Distance: 47.5 Miles
Elevation: 2,680M
Location: Brecon, Wales
Date: Sun, 14th Feb 2027
50 Miles
Beast of the Blacks 40 Miler
Distance: 40 Miles
Elevation: 3,385M
Location: Longtown, Hereford
Date: Sat, 6th Mar 2027
50 KM
Castle 2 Castle
Distance: 50KM
Elevation: 1,020M
Location: Welshpool, Wales
Date: Sun, 14th Mar 2027
Multi Day
Wild Horse South Wales 200
Distance: 200 Miles
Elevation: 9,144M
Location: Chepstow, Wales
Date: Wed, 14th Apr 2027
50 Miles
Beast of the Beacons 40 Miler
Distance: 40 Miles
Elevation: 2,571M
Location: Gilestone Farm, Brecon
Date: Sat, 17th Apr 2027
100 KM
North Wales 100K
Distance: 100KM
Elevation: 2,438M
Location: Prestatyn, Wales
Date: Sat, 24th Apr 2027
50 KM
North Wales 50K
Distance: 53.8KM
Elevation: 823M
Location: Prestatyn, Wales
Date: Sat, 24th Apr 2027
Back Yard Ultra
Medieval Backyard Ultra
Distance: Unlimited
Elevation: 52M
Location: South Wales
Date: Sat, 24th Apr 2027
50 KM
Vale Coastal Ultra
Distance: 52KM
Elevation: 388M
Location: Ogmore-by-Sea, Wales
Date: Sat, 24th Apr 2027
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