The Brutal is a Triple Ironman ultra marathon in Llanberis, United Kingdom. Distance: 545km. Elevation: 6,000m D+. Difficulty: legendary (Challenge Rating 45/100). DNF rate: 50%. Time limit: 72h. Surface: mixed. Established 2012.

Triple Ironman legendary mountainous mixed brutal remote

The Brutal

Llanberis, Snowdonia, United Kingdom

"Triple ironman. Glacial lakes. Snowdonia mountains. 50% DNF."

Challenging

Distance 545km

Elevation Gain ↑6,000m

Surface mixed

DNF Rate 50%

Cutoff 72h

What Makes It Unique

A nonstop triple ironman in Snowdonia — swim, bike, run to Snowdon's summit.

The Course

An extreme triathlon in Snowdonia, Wales: 3.8km open-water swim in the glacial Llyn Padarn, a 180km bike ride through the mountain passes of Snowdonia National Park (including the Llanberis Pass and Pen-y-Pass — two of Britain's most dramatic mountain roads), and a full marathon that summits Mount Snowdon (1,085m) via the Llanberis Path. The run section alone would be a significant mountain challenge; after 3.8km of cold water and 180km of Welsh mountain cycling, it becomes an exercise in survival. Welsh weather adds the final variable — rain, wind, and cloud that can reduce Snowdon visibility to zero.

Profile

mountainous

Topology

point-to-point

Aid Stations

Yes Crew Access

Yes Pacers

Yes Mandatory Gear

Runner Experience

Scenery 5/5

Organization 3/5

Community 3/5

Aid Stations

Solid aid station network with 15 stops along the course. Standard ultra fare — food, electrolytes, first aid.

Post-Race Culture

Intimate finish in a remote setting. The camaraderie of shared hardship creates deep bonds between finishers.

Race Day Weather

Temperature

14°C

8° – 18°

Humidity

80%

Rain Chance

60%

Conditions

Welsh summer — wet, cool, windy.

Stats & Records

Established

2012

Finishers

Entry

Entry Cost

£495

Opens

October

Sells Out

—

Qualification Required Max Starters: 80

Official Website →

Lore & Trivia

The Brutal is exactly what the name promises — an extreme triathlon in Snowdonia, Wales, that combines a 3.8km open-water swim in Llyn Padarn, a 180km bike ride through the mountain passes of Snowdonia, and a full marathon up and over Mount Snowdon (1,085m). The run finishes on the summit of Wales' highest peak. The weather in Snowdonia is notoriously hostile — rain, wind, and low cloud can transform the mountain sections into survival exercises. The Brutal attracts iron-distance triathletes who find Ironman too flat, too warm, and too civilised. This is the opposite: a mountain triathlon in one of Britain's wettest, wildest corners, finishing on a summit where visibility can drop to zero.

▸ 3.8km swim, 180km bike, marathon (including Mount Snowdon summit) — extreme triathlon format.
▸ Finishes on the summit of Snowdon (1,085m) — Wales' highest peak.
▸ Snowdonia receives over 3,500mm of rainfall annually — expect rain.
▸ The bike course includes the Llanberis Pass — one of Britain's most dramatic mountain roads.
▸ Not a standard ultra — an extreme triathlon that qualifies by sheer suffering.
▸ The swim in Llyn Padarn is in a glacial lake at approximately 14°C.

Running a marathon up Snowdon after a 180km bike in Welsh rain — there's a reason they called it The Brutal.

— A 2022 finisher On the race living up to its name

Notable Editions

2019

Snowdon in the Cloud

Zero visibility on the Snowdon summit forced runners to navigate by cairn, with wind gusts exceeding 60mph on the exposed ridge. The bike section had already featured driving rain. Those who finished earned the name honestly.