Oceans Seven
The Oceans Seven is a marathon swimming challenge consisting of seven open water channel swims. It was devised in 2008 as the swimming equivalent of the Seven Summits mountaineering challenge. It comprises the North Channel, the Cook Strait, the Molokaʻi Channel, the English Channel, the Catalina Channel, the Tsugaru Strait and the Strait of Gibraltar.
The record for the fastest cumulative time for the completion of the 7 swims is held by Scot Andrew Donaldson, with a total swim time of 63 hours, 2 minutes.
The record for the fastest completion of all seven swims is held by Bulgarian Petar Stoychev who achieved it in 173 days, completing on 14 August 2024.
The record for the youngest ever person to complete all 7 swims is held by New Zealander Caitlin O'Reilly who was 20 years, 7 months, and 15 days old upon completion.
List of Oceans Seven swims
- The North Channel: between Ireland and Scotland,
- The Cook Strait: between New Zealand’s North and South Islands,
- The Molokaʻi Channel : between Moloka’i and O’ahu,
- The English Channel: between England and France,
- The Catalina Channel: between Santa Catalina Island and Los Angeles,
- The Tsugaru Strait: between the Japanese islands of Honshu and Hokkaido,
- The Strait of Gibraltar: between Spain and Morocco,
List of successful completions
| Name | Date completed | Nation | Notes | |
| 1 | Stephen Redmond | Ireland | First ever to complete all seven swims. Total time 2 years 344 days; cumulative time 104 hours 19 minutes. | |
| 2 | Anna-Carin Nordin | Sweden | First woman to complete all seven swims. Total time 2 years 290 days; cumulative time 182 hours 39 mins. | |
| 3 | Michelle Macy | United States | ||
| 4 | Darren Miller | United States | ||
| 5 | Adam Walker | United Kingdom | ||
| 6 | Kimberley Chambers | New Zealand | ||
| 7 | Antonio Argüelles | Mexico | ||
| 8 | Ion Lazarenco-Tiron | Republic of Moldova | First from a landlocked country | |
| 9 | Rohan Dattatrey More | India | First Asian | |
| 10 | Abhejali Bernardová | Czech Republic | ||
| 11 | Cameron Bellamy | South Africa | First South African | |
| 12 | Lynton Mortensen | Australia | First Australian | |
| 13 | Thomas “Fleppy” Pembroke | Australia | ||
| 14 | Nora Toledano Cadena | Mexico | ||
| 15 | Mariel Hawley Dávila | Mexico | ||
| 16 | André Wiersig | Germany | ||
| 17 | Elizabeth Fry | United States | ||
| 18 | Attila Mányoki | Hungary | Fastest cumulative time until Donaldson, 2023 | |
| 19 | Jonathan Ratcliffe | United Kingdom | ||
| 20 | Jorge Crivillés | Spain | First Spaniard | |
| 21 | Adrian Sarchet | Guernsey | ||
| 22 | Prabhat Koli | India | - | |
| 23 | Dina Levačić | Croatia | First Croat, youngest | |
| 24 | Herman van der Westhuizen | South Africa | - | |
| 25 | Andrew Donaldson | United Kingdom | Fastest total time until Stoychev, 2024; Fastest cumulative time. Note: the previous record for total time was 2 years 60 days. | |
| 26 | Stephen Junk | Australia | ||
| 27 | Kieron Palframan | South Africa | ||
| 28 | Bárbara Hernández | Chile | First South American. | |
| 29 | Mark Sowerby | Australia | ||
| 30 | Zach Margolis | United States | First openly LGBTQ+ | |
| 31 | Paul Georgescu | România | First Romanian | |
| 32 | Petar Stoychev | Bulgaria | First Bulgarian. Fastest total time | |
| 33 | Nathalie Pohl | Germany | First German woman. | |
| 34 | Caitlin O'Reilly | New Zealand | Youngest ever swimmer to complete the Oceans Seven at 20 years, 7 months, and 15 days. | |
| 35 | Ryan Utsumi | 18 April 2025 | United States | |
| 36 | Bengisu Avcı | 4 August 2025 | Türkiye | First Turkish swimmer. Cumulative time |