Sirona 100 Mile Ultra
Distance: 103 Miles
Elevation: 4,572M
Location: Barmouth, Wales
Date: Sat, 11th Jul 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!
39 events found
Map View100 Miles
50 KM
Snowdonia Ultra Marathon Eryri
Distance: 57KM
Elevation: 2,199M
Location: Llanberis, North Wales
Date: Sun, 12th Jul 2026
100 Miles
Dragon Coastal 100
Distance: 101 Miles
Elevation: 3,400M
Location: Rhossili Bay, Wales
Date: Sat, 18th Jul 2026
50 Miles
Dragon Coastal 50
Distance: 50 Miles
Elevation: 1,300M
Location: Kenfig, Wales
Date: Sun, 19th Jul 2026
50 KM
Dragon Coastal 30
Distance: 49KM
Elevation: 460M
Location: Southerndown, Wales
Date: Sun, 19th Jul 2026
100 KM
Beacons Way Ultra 100Km
Distance: 100 Km
Elevation: 3,451M
Location: Brecon Beacons
Date: Sat, 25th Jul 2026
100 Miles
Beacons Way Ultra 100 Miles
Distance: 100 Miles
Elevation: 6,143M
Location: Brecon Beacons
Date: Sat, 25th Jul 2026
100 KM
Ultra X Wales 110K
Distance: 110KM
Elevation: 4,816M
Location: Abergavenny, Wales
Date: Sat, 25th Jul 2026
50 KM
Ultra X Wales 50K
Distance: 50KM
Elevation: 2,166M
Location: Abergavenny, Wales
Date: Sun, 26th Jul 2026
50 Miles
EDDUM 50 Miler
Distance: 50 Miles
Elevation: 2,608M
Location: Noyadd Farm Camping, Builth Wells
Date: Sat, 1st Aug 2026
50 KM
Brecon Beacons 51K
Distance: 51KM
Elevation: 2,144M
Location: Talybont-on-Usk, Brecon Beacons
Date: Sat, 8th Aug 2026
50 KM
Skyrun Eryri 14 Peaks
Distance: 55KM
Elevation: 3,900M
Location: Aber Falls Distillery, Wales
Date: Sat, 15th Aug 2026
50 KM
Beast of Llangattock
Distance: 51KM
Elevation: 1,475M
Location: Llangattock, Wales
Date: Sat, 22nd Aug 2026
Multi Day
Ring O’ Fire
Distance: 130 Miles
Elevation: 4,000M
Location: Holyhead, North Wales
Date: Fri, 4th Sep 2026
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 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
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