Toughest

Requirements

  • Done at least twice.

Ocean Channels

SwimRouteDist (km)# swimsAssoc
Palk Strait Sri Lanka / mainland India 29 10 none
Gulf of the Farallones Farallon Islands / Calif. mainland 33-48 5 monitored
Santa Barbara Channel (west) Channel Islands / Calif. mainland 38-40 3 SBCSA
Strait of Juan de Fuca British Columbia (Canada) / Washington (USA) 17 8 NOWSA
Beltquerung Fehmarn (Germany) / Lolland (Denmark) 19 29 monitored
Foveaux Strait Stewart Island / South Island (New Zealand) 29 8 none
Alenuihaha Channel Kauai / Oahu (Hawaiian Islands) 48 4 monitored
Menorca Channel Menorca / Mallorca 37 Mencorca C.S.A.
Fastnet Fastnet Rock / Ireland mainland none
Dal Riata Channel Mull of Kintyre (Scotland) / Ballycastle (N. Ireland) 2 monitored

Lakes

SwimRouteDist (km)# swimsAssoc
Lake Ontario Niagara-on-the-Lake / Toronto 50 SSO
Lake Geneva Montreux / Geneva 69 LGSA
Loch Ness Fort Augustus / Loch End 36 monitored
Lake Memphremagog Newport (Vermont) / Magog (Quebec) NEKOWSA
Lake Tahoe S. Lake Tahoe (Cal.) / Incline Village (Nev.) 34 50+

Bays, Estuaries, Rivers

SwimRouteDist (km)# swimsAssoc
Monterey Bay Monterey / Santa Cruz 40 4 MBSA
Rio de la Plata Colonia del Sacramento (Uru.) / Pta Lara (Arg.) 40 27
Derwent River New Norfolk Bridge / Tasman Bridge 34 4 monitored
False Bay Rooi Els / Miller's Point (S. Africa) 33 5 CLDSA
Tampa Bay Sunshine Skyway / Campbell Causeway (Florida) 34 100+ annual event

Circumnavigations & Island Loops

SwimRouteDist (km)# swimsAssoc
Isle of Wight British Isles 90 4 monitored
Round-Trip Angel Island Angel Island loop from Aquatic Park (S.F.) 16 14 monitored
Robben Island loop Robben Island loop from Cape Town 21-31 7 CLDSA
Hong Kong circumnavigation 45 3 none
Round Jersey 100+ JLDSC

No established routes

  • Lake Titicaca
  • Lake Baikal