Marathon Swims

A marathon swim is a nonstop, unassisted open water swim of 10 kilometers or longer.

Marathon swims take place in oceans, seas, bays, lakes, and rivers throughout the world - as part of organized events, sanctioned solo swims, or self-organized independent solo swims.

Iconic Swims

A curated list of the world’s most iconic marathon swim events and solo swims. Swims to do before you die.

Go to: MSF Iconic Swims

Swim Event Calendars

For a more extensive list of marathon swims, see MSF’s continuously-updated calendars of organized marathon swims:

Go to:

Independent Swim Ratification

A service for ratifying and publishing documentation of independent solo and relay marathon swims.

Go to: MSF Documented Swims

Historical Results Database

LongSwimsDB is the world’s most comprehensive repository of solo marathon swim results, with nearly 40,000 documented, unassisted swims 209 unique events and solo routes by over 15,000 swimmers.

Go to:

Bucket List Challenges

Marathon Swimming Records