The ultimate test. An Boireann Mór — 'The Great Burren' — is a 125km epic that covers the full breadth of the Burren and...
The ultimate test. An Boireann Mór — 'The Great Burren' — is a 125km epic that covers the full breadth of the Burren and Wild Atlantic Way. From the start in The Connacht Hotel, Galway, you'll ride north into the raw heart of the limestone plateau, west to the Cliffs of Moher, and along the full Atlantic coastline before the gruelling return inland. This is a ride that will stay with you forever.
The route passes within sight of Ireland's most iconic landmark. The climb up from Doolin is relentless but the views are extraordinary.
Perhaps the most beautiful stretch of road in Ireland — a narrow ribbon of tarmac between the Atlantic Ocean and the Burren's limestone terraces.
The centrepiece of the route: 25km across the high, exposed limestone karst where nothing grows above knee height and the silence is total.
Unlike the 90km route, you'll tackle Corkscrew from the steeper western approach. Category 2, 3.5km at 8%. The final major obstacle before home.
A serious endurance challenge with sustained climbing throughout. Four categorised climbs including the Cliffs approach (Cat 3), Corkscrew Hill west (Cat 2), and two long drags across the Burren plateau. Total elevation gain approximately 2,200m. Flat sections are limited to the coastal road and the final 15km home.
Train specifically for this route. You need a solid base of 200+ weekly kilometres for at least 6 weeks beforehand.
Nutrition is everything on a 125km ride. Eat early and often — by the time you feel hungry, you're already behind.
The Burren plateau crossing (km 85–110) is the crux. It's exposed, often windy, and mentally demanding. Stay focused.
Carry two bottles and refill at every food stop. Dehydration on the plateau will end your day.
Start conservatively. The first 40km feel easy — that's the trap. The route doesn't truly begin until the Cliffs approach.
Secure your place on the 125km route — every pedal stroke supports Irish Guide Dogs.
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