From Openwaterpediamarathon swims of 16 miles (25 km) or more. These include the English Channel, the Catalina Channel and the Manhattan Island Marathon Swim as a member of the Triple Crown of Open Water Swimming and the Half Century Club. He also completed the 41-mile (65.9 km) Round Jersey, 26.4 km Lake Zurich Marathon Swim, the 19.2 km Rottnest Channel Swim, and was the first (and only) swims around Valentia Island (27 km) and Great (Cobh) Island (16 km) in Ireland. He also swam between Robben Island and Cape Town in South Africa (11 km), Rathlin Island (10 km), Cork City to Monkstown (12.8 km), Garryvoe around Ballycotton and into Ballycotton Pier (11 km), and River Lee Dam to County Hall (12.5 km) twice. In 2006, he crossed the Santa Barbara Channel between Santa Cruz Island and the California mainland in a record time of 10 hours, 27 minutes. He also became the fifth person in history to cross False Bay in 30 December 2012 from Rooi Els to Miller's point in 11 hours 5 minutes under the guidance of pilot Arend Grondman. He is the only person to date swim around Skellig Michael in Ireland.
He is head of the selection committee of the 25-mile In Search of Memphre international marathon swim between Vermont, U.S.A. and Magog, Canada.
Denison’s early aquatic years were spent as a seven-time All-American water polo goalie with teams in New York City, Berkeley, California and London, England.
He coined the Triple Break or the Triple Crown of Prison Island Swims (Alcatraz Island in the USA, Spike Island in Ireland, and Robben Island in South Africa). He also created the Cork Distance Week that was nominated for the 2012 World Open Water Swimming Offering of the Year award.
Denison was inducted on the Queen Mary in Long Beach, California at the annual International Marathon Swimming Hall of Fame ceremonies as a member of the Class of 2012 as an Honour Administrator. He also received the Irving Davids-Captain Roger Wheeler Memorial Award from the International Swimming Hall of Fame in the Class of 2013 where he will be honoured in Cork, Ireland at the annual International Marathon Swimming Hall of Fame ceremonies.
Denison helps organise several of the longer swim in Ireland and leads the annual Cork Distance Week, which draws more than 50 swimmers. He is an excellent contact (firstname.lastname@example.org) for American swimmers looking to Europe.
Santa Barbara Channel Swimming Association
Commenting on his Santa Barbara Channel swim: "My wife and I were absolutely taken in by the city and hosted in fine fashion by the other Board members, kayakers and three Honourees of the IMSHOF: Alison and Freda Streeter and David Yudovin. On the day the sun was fantastic and the playful seals and majestic manta rays were the best aquatic life I have ever seen on a swim."
Cork Distance Week
Denison's Cork Distance Week was nominated for the 2012 World Open Water Swimming Offering of the Year award. Its World Open Water Swimming Association nomination reads, A tiny part of the world – Sandycove Island in Ireland – has become a must-do and must-see in the channel swimming world. Sandycove plays host to the Cork Distance Week, the absolutely most brutal, the most unforgiving, the downright dastardly difficult open water swimming camp in the world. Led by a mountain of a man who has pushed himself to the brink, the Cork Distance Week has a tremendous record of channel swimming success. Offered for an unbelievable reasonable price in elements that can be completely and thoroughly unreasonable, the Cork Distance Week prepares all-comers for anything and everything in the open water. For its 8-day high mileage of intense preparation, for its unyielding psychological and physiological stress that it offers, for its unequaled record of success, the Cork Distance Week by Ned Denison is a worthy nominee for the 2012 WOWSA Open Water Swimming Offering of the Year.
Catalina Channel Half Century Club
1. Bob West (USA), 62, CM in 15:49 in 1998
2. Gary Greenwood (USA), 62, CM in 13:08 in 2004
3. Pat Gallant-Charette (USA), 60, CM in 14:11 in 2011
4. Mo Siegel (USA), 60, CM in 13:08 in 2011
5. Bob Needham (USA), 58, CM in 13:10 in 2011
6. Tom Hecker (USA), 57 in 10:45 in 2009
7. Richard Knepper (USA), 56, MC in 11:56 in 2005
8. Barbara Held (USA), 56, CM in 9:36 in 2010
9. Carol Sing (USA), 55, CM in 10:38 in 1997
10. Bill Hoehn (USA), 55, CM in 12:57 in 2005
11. Kevin Murphy (Great Britain), 54, CM in 15:23 in 2003
12. Roger Finch (South Africa), 54, CM, 9:45:02 in 2012
13. Dave Van Mouwerik (USA), 54,, CM, 12:09:07
14. Ned Denison (Ireland), 54, CM, 8:50:04 in 2012
15. Nick Almos-Lau (Mexico), 53, CM in 12:40 in 1999
16. James Fitzpatrick (USA), 53, CM in 14:59 in 2008 (to Newport Beach)
17. Jim McConica (USA), 53, CM in 10:19 in 2004
18. Douglas McConnell (USA), CM, 12:41:13 in 2012
19. David Cooper (USA), 52, CM in 13:19 in 2005
20. Dan Richards (USA), 52, CM in 10:10 2008
21. Alan Bell (USA), 51, CM in 9:28 in 2001
22. Chris Palfrey (Australia), 51, CM in 10:30 in 2009
23. Lynn Kubasek (USA), 51, CM in 15:53 in 2009
24. Daniel Robinson (USA), 51, CM in 9:57 in 2008
25. Antonio Argüelles (Mexico), 50, CM in 10:25 in 2009
26. William Newbern (USA), 50, CM in 12:48 in 2005
27. Ray Meltvedt (USA), 50, CM in 15:25 in 2010
28. Suzie Dods (USA), 50, MC in 18:36 in 2010
29. Dale Petranech (USA), 50, CM in 13:28 in 1985
30. John Hill (USA), 50, CM in 19:15 in 1985
31. Frank Reynolds (USA), 50, CM in 10:34 in 1987
32. Jim Barber (USA), 50, CM in 8:43 in 2010
33. Sue Free (USA), 50, CM, 11:23 in 2012
34. Bridgette Hobart Janeczko (USA), 50, CM 11:27:16 in 2012
35. Hendrik Meerman (USA), CM, 50, 12:48:30 in 2012
- Are You Tough Enough For The Body Brain Confusion Swim?
- In Search of Memphre
- International Marathon Swimming Hall of Fame
- Distance Swim Camp
- Open Water Swimming Safety Discussed In Global Conference
- How To Be Safe In The Open Water
- On Golden Pond
- Triple Crown of Open Water Swimming
- International Marathon Swimming Hall of Fame Class of 2013
- Ned Denison Honored Again By Hall Of Fame
- World Open Water Swimming Association
- 2012 World Open Water Swimming Offerings of the Year Nominations
- Cork Distance Week, Offering Of The Year Nominee
- Swimmers Caught Out Of The Water
- Crowned In Cork, Good Things Come In Threes
- The Best Eggbeater In The Business
- 100 x 100 @ 100, A Sandycove Island Rite Of Passage
- Great Whites vs. Great Irish, No Falsehood In The Bay
- Ned Denison Will Be Sweating It In False Bay
- Ned Denison Faces The Truth In False Bay
- Swimming Safely With Thoughts Of Sharks
- Parenting In The Open Water - Part 1
- Solitary No Long, Swimming Around Skellig Michael
- 30 Open Water Swimmers Known By One Name
- WOWSA, IMSHOF Heads To Cork, Ireland
- Shhhhh...Don't Tell Anyone About The Prison Break
- Eliminating The Fear Of Sharks In The Open Water
- Why Make A Fist In The Open Water?
- S.C.A.R. To Begin Tomorrow
- Fearsome, Ferocious, Fickle Farallones Awaits The Irish
- Ned Denison's Ice Mile
- S.C.A.R.'ed But Still Standing Tall At The Hall of Fame
- Is North-to-South Easier Than South-to-North?
- Ned Denison Represents Cork, Ireland, Open Water World
- Slots Still Open For the World 10-Mile Championships
- No False Moves. Dramatic Visualization of Shark Encounters
- Publicizing Heroes And Heroines Of Open Water Swimming