The route

750m Distance

Take the famous mussel boat out into the heart of Killary Fjord, jump from the deck, and swim back to the shore. A very achievable distance for first-timers - and an extraordinary way to experience Ireland’s only fjord.

Cut-off time: 40 minutes

2km Distance

The Connemara Lady takes you further out into Killary Fjord for a longer, more demanding swim back to shore. A fantastic step up for swimmers with some experience, offering both challenge and stunning views all the way in.

Cut-off time: 1 hour 30 minutes

3.9km Distance

A looped route from the Killary shore - but by no means easy. This is the full Ironman swim distance and a true test of endurance, designed for confident and experienced open water swimmers in the dramatic setting of Killary fjord.

Cut-off times: reach 2km in 1 hour and finish within 2 hours.

We recommend a wetsuit for this distance.

NEW 8km Distance - COMING SOON!

For marathon swimmers, this is the one you’ve been waiting for. Following on from the 12km River Swim in Lanesborough, the Gaelforce 8km Fjord Swim will be our longest sea swim yet, set in the wild Atlantic waters of Killary Fjord.

This race is for experienced swimmers only. Registration will open soon - leave your details below to be the first to know when it launches.

Be First to Hear

Safety & Entry Requirements

The water temperature at this time of year is usually around 12–14°C. You’ll need open water swimming experience to take part and should only enter a distance you’ve completed before in similar conditions.

Tow-floats must be worn by all swimmers. These can be rented during entry or on the day at the information desk.

Our team of kayakers and safety boats will be with you throughout the swim, and a medical team will also be on hand for your safety and peace of mind.

The Gaelforce Great Swim Trilogy

This is the final event of the Gaelforce Great Swim Trilogy. Swim the River Shannon, Lough Derg and Killary Fjord to complete the trilogy and earn your exclusive Gaelforce Great Swim Trilogy mystery gift.

Sign up for all three before 16 May 2026 to qualify.

The trilogy is designed as a journey - from lake, to river, to sea. With events in late spring, mid-summer and autumn, you can build your distances and experience as you go. The perfect challenge for your swimming year.

Gaelforce Great River Swim | Gaelforce Great Lake Swim

Route map