Swimming Challenges

Taking on a big swim is one of the most rewarding things you’ll ever do. We help you prepare, qualify and plan safely — combining decades of endurance experience with expert coaching and a supportive community to see you through.

From straits to lakes, and everything in between

World-class challenges, guided with passion and experience

Each challenge brings its own demands — physical, logistical and emotional.We’ve helped swimmers complete some of the UK’s most iconic open-water feats, from the English Channel, Round Jerseys to Windermere and beyond.

Our approach includes:

Planning unique to you — a fully bespoke approach

No stone left unturned — qualifiers, feeds, and safety covered

Mentorship — building confidence as well as physical ability

Community — opportunities to train alongside like-minded swimmers

Loch Awe

A 25-mile (41km) classic — swimming past islands and ruined castles in a loch that is both beautiful and demanding.

Loch Ness

Big, bold and iconic — 23 miles of cold, deep water in the Scottish Highlands.

Loch Lomond

This 22.4 mile iconic loch offers a formidable test of endurance — cold, expansive and beautifully remote. A full-length crossing of Loch Lomond is not simply about distance; it is about navigating scale, conditions and complexity across one of Britain’s most iconic freshwater landscapes.

English Channel

We support both 21 mile solo and relay swimmers from first enquiry to landing in France — including qualifying swims, tide and pilot guidance, and full-season training plans. Each crossing is documented so your story becomes part of Channel history.

Windermere One-Way

10.5-mile freshwater challenge through the heart of the Lake District. For many swimmers, this is the defining English marathon — a major but accessible UK swim that carries history, prestige and genuine endurance credibility.

Annecy

Swim through the cleanest water in Europe. Lake Annecy offers an 8.5-mile alpine crossing with stunning visibility and a breathtaking mountain backdrop.

Ullswater

Often cited as England's most beautiful lake, Ullswater offers a 12km Alpine lake swim that tests your ability to navigate changing wind directions.

Buttermere

The quintessential Lake District swim. Choose your distance in the pristine waters of Buttermere, surrounded by a breathtaking amphitheatre of mountains.

Coniston Water

Follow in the wake of history. Coniston Water’s 5.25-mile crossing is a fast, flat, and historic swim perfect for those targeting their first "long" lake.

Bassenthwaite Lake

Almost 3 miles long, this stunning glacial water will take your breath away. A full crossing of Bassenthwaite is about maintaining rhythm and discipline while navigating wind, surface movement and sustained distance in open freshwater.

Wastwater

This 2.8 mile swim across England’s deepest lake is short on distance but high on intensity. A full crossing of Wast Water is about cold tolerance, mental focus and swimming in a powerful, enclosed landscape where conditions can change quickly and silence dominates the water.

Crummock Water

A hidden gem of the Lake District. Crummock Water offers a 2.5-mile wild swimming experience through some of the most dramatic scenery in the UK.

BLDSA Qualifying Swims

Recognised Channel Swimming Association (CSA), the Channel Swimming & Piloting Federation (CS&PF) and Marathon Swimmers Federation (MSF) qualifying swims are an essential step for many major marathon events. We provide full safety cover, temperature, photo and video verification, official observation, and practical coaching support throughout.

Big ideas? Not sure where to start? Book a free kick-start call with Karen

If you’ve got an idea, a dream route, or just a feeling that you’d like to do something extraordinary, Karen can help you shape it into a realistic, safe and achievable plan. On the call, you’ll cover expectations, what’s realistic, and the likely steps needed to get there.

A picture of karen quartermain - book a call with Karen