Certainly channel swims, solo marathon swims and relay marathons are long endurance events, but what are the longest solo, non-wetsuit, competitive open water swims in the world?

In addition to the English Channel, North Channel, Catalina Channel, Molokai Channel, Tsugaru Channel, Cook Strait and Strait of Gibraltar, this is a short list of marathon competitions over 10K that are held annually around the world.

Swims listed by distance:

1. 193 km (120 miles): 8 Bridges Hudson River Swim in New York (7-day stage swim)
2. 88 km (54.6 miles): Maratón Internacional Hernandarias – Paraná in Argentina
3. 81 km (50.3 miles): India National Open Long Distance Swimming Championship in West Bengal, India
4. 70 km (43.5 miles): Vuelta a nado Isla de Ibiza in Ibiza, Spain (5-day stage swim)
5. 60 km (37.2 miles): Open Water Swimming Marathon Kalamata in the Messiniakos Gulf in South Peloponnesus, Greece
6. 57 km (35.4 miles): Maratón Acuático Rio Coronda in Argentina
7. 45.8 km (28.5 miles): Manhattan Island Marathon Swim in New York, USA
8. 43.4 km (27 miles): END-WET in North Dakota, USA
9. 40.2 km (25 miles): In Search of Memphre in Vermont, USA
10. 38.6 km (24 miles): Tampa Bay Marathon Swim in Florida, USA
11. 36 km (22.3 miles): Maratona del Golfo Capri-Napoli in Italy
12. 35 km (21.7 miles): Salish Sea Swim in Vancouver, Canada
13. 34 km (21.2 miles): Traversée Internationale du lac Memphrémagog in Quebec, Canada
14. 33.7 km (21 miles): British Long Distance Swimming Association Two-way Windermere in Windermere, England
15. 33.7 km (21 miles): British Long Distance Swimming Association in Loch Lomond in Scotland
16. 32.2 km (19.9 miles): International Bangla Marathon Swim in Bay of Bengal, Bangladesh
17. 32 km (19.8 miles): Traversée Internationale du lac St-Jean in Quebec, Canada
18. 31.8 km (19.8 miles): 8 Bridges Hudson River Swim – Stage 5 in New York, USA
19. 31.8 km (19.8 miles): 8 Bridges Hudson River Swim – Stage 2 in New York, USA
20. 30.83 km (19.15 miles): Ultramarató de l’Ebre 30830 Swim Marathon in Amposta, Catalonia, Spain
21. 30.5 km (19 miles): All India Sea Swimming Competition in India
22. 30 km (18.6 miles): Ohrid Lake Swimming Marathon in Macedonia
23. 30 km (18.6 miles): Giants of the Bay Race in Victoria, Australia
24. 30 km (18.6 miles): Open Water Swimming Marathon Kalamata in the Messiniakos Gulf in South Peloponnesus, Greece
25. 29.4 km (18.3 miles): 8 Bridges Hudson River Swim – Stage 1 in New York, USA
26. 29.1 km (18.1 miles: 8 Bridges Hudson River Swim – Stage 7 in New York, USA
27. 28.1 km (17.5 miles): Ederle Swim from New York to New Jersey, USA
28. 28 km (17.3 miles): Palmy Manly Swim from North Palm Beach in Sydney to Manly’s Shelly Beach in Australia
29. 27.3 km (17 miles): Rose Pitonof Swim in New York, USA
30. 27 km (16.7 miles): La Batalla De Rande A Nado in San Simon, Spain
31. 26.5 km (16.4 miles): International Self-Transcendence Marathon in Lake Zurich, Switzerland
32. 26 km (16.1 miles): International Swimming Marathon of Toroneos Gulf in Nikiti, Greece
33. 25.2 km (15.7 miles): 8 Bridges Hudson River Swim – Stage 6 in New York, USA
34. 25 km (15.5 miles): U.S. Masters Swimming 25K National Championships
35. 25 km (15.5 miles): Cruce del Puerto Rosario in Rosario, Argentina
36. 25 km (15.5 miles): St. Vincent’s Foundation Swim Across the Sound from Connecticut to New York, USA
37. 25 km (15.5 miles): Villa Urquiza – Paraná in Paraná, Argentina
38. 25 km (15.5 miles): FINA World Swimming Championships 25 km
39. 25 km (15.5 miles): LEN European Championships 25 km
40. 25 km (15.5 miles): Pensacola Bridge Swim in Florida, USA
41. 25 km (15.5 miles): Toroneos Gulf Swim in Greece
42. 24.4 km (15.2 miles): 8 Bridges Hudson River Swim – Stage 4 in New York, USA
43. 24 km (14.9 miles): St. Petersburg to Kotlin Island in Russia
44. 24 km (14.9 miles): Travessia 14 Bis across the Bertioga Channel in Brazil
45. 22 km (13.6 miles): Ijseelmeerzwemmarathon in the Netherlands
46. 21.2 km (13.2 miles): 8 Bridges Hudson River Swim – Stage 3 in New York, USA
47. 21 km (13 miles): International Marathon Swimming Beltquerung from Denmark to Germany
48. 21 km (13 miles): Travesia En Aguas Abiertas Por la Ruta de Olaya in Lima, Peru
49. 21 km (13 miles): Vidösternsimmet in Vidöstern, Sweden
50. 20.2 km (12.6 miles): Distance Swim Challenge in California, USA
51. 20.1 km (12.5 miles): Swim Around Key West in Florida, USA
52. 20.1 km (12.5 miles): FKCC Swim Around Key West in Florida, USA
53. 20 km (miles): Lake Argyle Swim in Lake Argyle in Western Australia
54. 19.7 km (12.2 miles): Rottnest Channel Swim (Rotto Solo) in Perth, Australia
55. 19.3 km (12 miles): Swim Around Charleston, South Carolina, USA
56. 19.3 km (12 miles): That Dam Swim in Alabama, USA
57. 19 km (11.8 miles): Medunarodni Plivački Maraton (Jarak-Šabac Marathon Swim) in Serbia
58. 18.8 km (11.7 miles): RiverFest Endurance Swim in Oregon, USA
59. 18.5 km (11.2 miles): BCT Gdynia Marathon in Gdynia, Poland
60. 18 km (11.1 miles): Fiji Swims in Fiji
61. 17.7 km (11 miles): Portland Bridge Swim in Oregon, U.S.A.
62. 17 km (10.5 miles): ILDSA & Swim Ireland National 17k Championships in Lough Erne, Ireland
63. 17 km (10.5 miles): British Long Distance Swimming Association in Windermere, England
64. 16.2 km (10 miles): La Jolla Cove Swim Club 10-miler in La Jolla, California, USA
65. 16.2 km (10 miles): Kingdom Swim in Lake Memphremagog, Vermont, USA
66. 16.2 km (10 miles): Deer Creek Open Water Marathon Swim in Charleston, Utah, USA
67. 16.2 km (10 miles): U.S. Masters Swimming 9+ mile National Championships in Minnesota, USA
68. 16.2 km (10 miles): Swim The Suck in Tennessee River Gorge, Tennessee, USA
69. 16.1 km (10 miles): International Bangla Marathon Swim in Bay of Bengal, Bangladesh
70. 16 km (9.9 miles): Faros Marathon Swim in Croatia
71. 16 km (9.9 miles): Lake Trichonida Crossing in Greece
72. 16 km (9.9 miles): Swimming Peace Marathon from Greece to Turkey
73. 15 km (9.3 miles): Irish Long Distance Swimming Association Challenge Swim Lough Sheelin in Cavan, Ireland
74. 15 km (9.3 miles): Távúszást rendezünk Paks-Kalocsa from Paks to Kalocsa in Bács-Kiskun, Hungary
75. 14.5 km (9 miles): North Evoikos Swim in Greece
76. 14.1 km (8.76 miles): Henley Swim’s Bridge to Bridge Swim downstream in the Henley-on-Thames, England
77. 13.1 km (8.2 miles): Pennock Island Challenge in Alaska, USA
78. 13 km (8.12 miles): Great Salt Lake Marathon Swim in Utah, USA
79. 12.87 km (8 miles): Swim for Freedom in Wisconsin, USA
80. 12.87 km (8 miles): Boston Light Swim in Massachusetts, USA
81. 12.87 km (8 miles): YMCA & MVP Annual Lake Swim in Vermont, USA
82. 12.87 km (8 miles): Kirkton of Balmerino Championship in River Tay Estuary, Scotland
83. 11.2 km (7 miles): Bear Lake Open Water Swim in Utah, USA

84. 10.4 km (6.5 miles): Loch Earn Championship in Scotland
85. 11.1 km (7 miles): Maliakos Gulf Swim in Greece
86. 11 km (6.9 miles): Amvrakikos Gulf Swim in Greece
87. 10.2 km (6.3 miles): Little Red Lighthouse Swim in New York, USA
88. 10 km (6.2 miles): San Francisco Bay 10K Bridge to Bridge Swim in San Francisco Bay, California
89. 10 km (6.2 miles): Swim Across America Long Beach in Marine Stadium, Long Beach in California, USA
90. 10 km (6.2 miles): Nike Swim Miami in Miami, Florida
91. 10 km (6.2 miles): Diamond Lake Open Water Challenge in Minnesota
92. 10 km (6.2 miles): Pensacola Three-Mile Bridge Swim in Pensacola, Florida
93. 10 km (6.2 miles): USA Swimming Open Water Swimming Championships in Ft. Myers, Florida
94. 10 km (6.2 miles): Lake Del Valle Open Water Swim in Lake Del Valle, California
95. 10 km (6.2 miles): Fire Island Ocean Swims in New York
96. 10 km (6.2 miles): Sound to Cove Open Water Swim in New York
97. 10 km (6.2 miles): Change Your Latitude in Alaska
98. 10 km (6.2 miles): Swim to the Moon in New York
99. 10 km (6.2 miles): Horsetooth Open Water Swim in Horsetooth Reservoir, Colorado
100. 10 km (6.2 miles): Lake George Open Water Swim in Lake George, New York
101. 10 km (6.2 miles): CAST Classic in Idaho
102. 10 km (6.2 miles): Coney Island Aquarium Triple Dip Swim in Coney Island, New York
103. 10 km (6.2 miles): Flat River Reservoir Champions Challenge in Rhode Island
104. 10 km (6.2 miles): Escape From Skidaway from Georgia
105. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Santos, Brazil
106. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Patagones-Viedma, Argentina
107. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Eliat, Israel

108. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Cancun, Mexico

109. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in lac St-Jean, Roberval, Canada
110. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Lac Mégantic, Quebec, Canada
111. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Hong Kong

112. 10 km (6.2 miles): FINA 10km Marathon Swimming World Cup in Shantou, China
113. 10 km (6.2 miles): Bale of Tortugas in Lake Conroe, Texas
114. 10 km (6.2 miles): Lough Gill 10K in Sligo, Ireland
115. 10 km (6.2 miles): Camlough Lake 10K in Camlough, Ireland
116. 10 km (6.2 miles): Human Race Eton Swim in Eton, England,br/>
117. 10 km (6.2 miles): City Beach Swim in Western Australia
118. 10 km (6.2 miles): Champion Lakes Swim in Western Australia
119. 10 km (6.2 miles): Sorrento Swim in Western Australia
120. 10 km (6.2 miles): Bridge-to-Bridge in San Francisco Bay, California
121. 10 km (6.2 miles): Hellenic Championship 5 & 10 Km in Greece
122. 10 km (6.2 miles): USA Swimming National Open Water Swimming Championships in California and Florida
123. 10 km (6.2 miles): MAXIFUEL Nutrition Open Water Swim Challenge (Bray) in England
124. 10 km (62. miles): Secbands EPA Swim Challenge Series in East Cape, South Africa
125. 10 km (6.2 miles): Metro South West Open Water Championships in New South Wales, Australia
126. 10 km (6.2 miles): Berry Rickards in New South Wales, Australia
127. 10 km (6.2 miles): NSW Open Water Championships in New South Wales, Australia
128. 10 km (6.2 miles): Narranderra SC in Australia
129. 10 km (6.2 miles): King of the Rivers in the Netherlands

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