 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
|---|
 Jordan S J | 28.1 | | | 79 | 1 | 0 | 0 | 0 | | |
| 1994 | | 28:08:04 | | Cook G G & Jordan S J | Independent | 79 | | | | | | |
| Jorgensen Mia | 24.6 | | | 87 | 1 | 0 | 0 | 0 | | |
| 1988 | C2 | 24:37:45 | | Wilkinson Karin Lois & Jorgensen Mia | Marlow & Odense -DK | 87 | | | | | | |
| Jorgenson A | 19.2 | | | 2 | 1 | 0 | 1 | 0 | | |
| 1972 | | 19:13:05 | | Hansen S & Jorgenson A | Sundby - Denmark | 2 | | | 1 | | Civilian | |
| Jork R | 24.5 | | | 44 | 3 | 0 | 0 | 0 | | |
| 1983 | | 27:50:05 | | Jork R & Otto H J | Alster - Hamburg | 43 | | | | | | |
| 1984 | | 24:21:40 | | Jork R & Otto H J | Alster - Hamburg | 59 | | | | | | |
| 1986 | | 21:19:30 | | Jork R & Otto H J | Afster Hamburg | 29 | | | | | | |
| Jose Gary | 27.4 | | | 91 | 1 | 0 | 0 | 0 | | |
| 2010 | | 27:25:43 | | Jackson Simon & Jose Gary | Independent | 91 | | | | | | |
| Joseph Dylan | 22.9 | | | 15 | 1 | 0 | 0 | 0 | | |
| 2025 | | 22:55:48 | | Bandrowski Oskar & Joseph Dylan | RMKA | 15 | | | | | | |
| Joubert Dewald | 37.3 | | | 44 | 1 | 0 | 0 | 0 | | |
| 2003 | | 37:20:12 | | Cullen Brett & Joubert Dewald | Manx Paddlesport & Independent | 44 | | | | | | |
| Joy G S | 22.0 | | | 27 | 1 | 0 | 0 | 0 | | |
| 1979 | | 22:01:06 | | Joy G S & Midwood P | I M Marsh College | 27 | | | | | | |
| Joyce Benjamin | 26.9 | | | 54 | 1 | 0 | 0 | 0 | | |
| 2004 | | 26:53:29 | | Joyce Benjamin & Wright Damian | Richmond | 54 | | | | | | |
| Joyce M A | 27.4 | | | 75 | 1 | 0 | 0 | 0 | | |
| 1994 | | 27:26:40 | | Joyce M A & Ellis S J J | Frome | 75 | | | | | | |
| Joyce M L | 25.3 | | | 77 | 1 | 0 | 0 | 0 | | |
| 1986 | | 25:16:04 | | Norman M & Joyce M L | Westel | 77 | | | | | | |
| Joyce R | 25.5 | | | 8 | 1 | 0 | 0 | 0 | | |
| 1968 | | 25:27:30 | | Joyce R & Causer S | 3 Para | 8 | | | | | | |
| Joyles B | 22.7 | | | 4 | 1 | 0 | 0 | 0 | | |
| 1961 | | 22:44:00 | | Latimer B & Joyles B | Royal Marines | 4 | | | | | | |
| Judge D | 50.0 | | | 59 | 1 | 0 | 0 | 0 | | |
| 1972 | | 49:57:55 | | Bees S & Judge D | 2nd Royal Green Jackets | 59 | | | | | | |
| Junor Neville K | 30.8 | | | 1 | 1 | 1 | 0 | 0 | | |
| 1953 | FB | 30:47:00 | | Junor Neville K & Marchant Edward C | 21 (Artists) | 1 | | 1 | | | Tyne | |
| Jupp B | 22.7 | | | 4 | 1 | 0 | 0 | 0 | | |
| 1965 | | 22:40:30 | | Pagnanelli P & Jupp B | 63 Coy RASC (Para Bde) | 4 | | | | | | |
| Justice Daryl | 19.6 | | | 5 | 1 | 0 | 0 | 0 | | |
| 2019 | | 19:39:51 | | King Steve & Justice Daryl | Fire Service | 5 | | | | | | |
| K1 Single | 0.0 | | | 0 | 8 | 0 | 0 | 0 | | |
| 1958 | | | | Smith Ernest & K1 Single | | | | | | | | |
| 1970 | | 40:45:00 | | Worsly Sgt & K1 Single | Army Apprentice College Arborfield | | | | | | | |
| 1972 | | | | Hoskins H & K1 Single | Bradford on Avon | | | | | | | |
| 1975 | | 22:07:00 | | Ince A J & K1 Single | Independent | 0 | | | | | | |
| 1977 | | 26:50:00 | | Church Marcus & K1 Single | Independent | | | | | | | |
| 1978 | | 22:28:00 | | Bannister Peter & K1 Single | | | | | | | | |
| 1990 | | 22:20:00 | | Booles K L & K1 Single | | | | | | | | |
| 2021 | | 20:01:26 | | Hendron Richard & K1 Single | Independent | 0 | | | | | | |
| Kakes R E | 23.1 | | | 17 | 1 | 0 | 0 | 0 | | |
| 1996 | | 23:03:25 | | Kakes R E & King W R C | Trent College | 17 | | | | | | |
| Kane Iain | 39.0 | | | 137 | 1 | 0 | 0 | 0 | | |
| 2014 | | 39:01:25 | | Kane Iain & Cooper Andrew | Thames Valley Police | 137 | | | | | | |
| Kane Robert | 24.9 | | | 65 | 3 | 0 | 0 | 0 | | |
| 2014 | | 27:19:44 | | Kane Robert & Martin Benjamin | ACU DSEME | 99 | | | | | | |
| 2015 | | 25:11:52 | | Goodwin Matt & Kane Robert | Independent & Acu | 73 | | | | | | |
| 2016 | | 22:16:52 | | Goodwin Matt & Kane Robert | Independent | 24 | | | | | | |
| Kantolinna Blair | 23.8 | | | 37 | 4 | 0 | 0 | 0 | | |
| 2011 | | 23:08:51 | | Kantolinna Blair & Pearson James | Southampton | 24 | | | | | | |
| 2012 | | 23:08:24 | | Kantolinna Blair & Pearson James | Southampton | 25 | | | | | | |
| 2013 | | 23:10:03 | | Kantolinna Blair & Ryan Enda | Southampton | 35 | | | | | | |
| 2016 | | 25:35:46 | | Kantolinna Blair & Rogers Mike | Southampton & Poole Harbour | 65 | | | | | | |
| Katona Daniel | 19.5 | | | 15 | 1 | 0 | 0 | 0 | | |
| 2023 | | 19:31:23 | | Kovacs Andras & Katona Daniel | Wey Kc & International | 15 | | | | | | |
| Kavanagh John | 23.7 | | | 30 | 5 | 0 | 0 | 0 | | |
| 2004 | | 26:21:32 | | Kavanagh John & Fisher Adrian | Macclesfield & District | 47 | | | | | | |
| 2005 | | 24:10:17 | | Kavanagh John & Fisher Adrian | Macclesfield & District | 33 | | | | | | |
| 2006 | | 22:21:32 | | Kavanagh John & Price Nicholas | Macclesfield & District | 18 | | | | | | |
| 2007 | | 22:56:13 | | Kavanagh John & Price Nicholas | Macclesfield & District | 33 | | | | | | |
| 2008 | | 22:47:51 | | Kavanagh John & Price Nicholas | Macclesfield & District | 19 | | | | | | |
| Kavanagh T | 22.4 | | | 32 | 1 | 0 | 0 | 0 | | |
| 1994 | | 22:24:01 | | Kavanagh T & Dooley M T | West Cumbria | 32 | | | | | | |
| Kaye Mike | 23.1 | | | 51 | 1 | 0 | 0 | 0 | | |
| 2010 | | 23:05:26 | | Welton Ted (Edward) & Kaye Mike | Dales | 51 | | | | | | |
| KcKeown B M | 24.3 | | | 63 | 1 | 0 | 0 | 0 | | |
| 1992 | | 24:17:10 | | Nielson K N & KcKeown B M | Deeside | 63 | | | | | | |
| Keane A M | 34.1 | | | 5 | 3 | 0 | 0 | 1 | | |
| 1951 | | 32:56:00 | | Keane A M & Bacon C | HMS Excellent | 7 | | | | | | |
| 1955 | | 35:42:00 | | Keane A M & Bacon C | H M Sub Subtle | 3 | | | | 1 | Home Built | |
| 1956 | | 33:46:00 | | Keane A M & Crickard F W | Royal Navy & Royal Canadian Navy | 4 | | | | | Home Built | |
| Keane D W | 34.4 | | | 5 | 2 | 0 | 0 | 1 | | |
| 1950 | | 40:11:00 | | Keane D W & Davies A | 3rd Hillingdon Rover Sea Scouts | 3 | | | | 1 | | |
| 1951 | | 28:42:00 | | Keane D W & Davies A | 3rd Hillingdon Rover Sea Scouts | 6 | | | | | | |
| Keane S J | 20.7 | | | 22 | 4 | 0 | 0 | 0 | | |
| 1984 | | 22:10:18 | | Keane S J & Rossiter P R | ID &D (Army) | 31 | | | | | | |
| 1985 | | 19:40:20 | | Keane S J & Rossiter P R | 1st Wessex (Army) | 10 | | | | | | |
| 1987 | | 20:26:26 | | Keane S J & Hosking N P | 1st Bn Wessex Regt | 24 | | | | | | |
| 1988 | | 20:21:35 | | Keane S J & Hosking N P | Army CF | 24 | | | | | | |
| Keay R J | 25.2 | | | 6 | 2 | 0 | 0 | 0 | | |
| 1960 | | 25:07:00 | | Keay R J & Repper K E | 1 Para | 5 | | | | | Home Built | |
| 1961 | | 25:21:00 | | Keay R J & Quinn D | 1 Para | 7 | | | | | | |
| Keeble James | 21.8 | | | 30 | 2 | 0 | 1 | 0 | | |
| 2007 | | 25:20:28 | | Archondakis Alan & Keeble James | Bourne End Junior Sports Club | 58 | | | | | | |
| 2012 | | 18:21:17 | | Seaford Daniel & Keeble James | Reading | 2 | | | 1 | | Civilian | |
| Keeble P A | 29.1 | | | 41 | 1 | 0 | 0 | 0 | | |
| 1975 | | 29:08:25 | | Keeble P A & Day T W | 16th Twickenham & Leander Scouts | 41 | | | | | | |
| Keeble W R | 27.6 | | | 99 | 1 | 0 | 0 | 0 | | |
| 1984 | | 27:36:04 | | Socker B A & Keeble W R | 1st Gwinear Scouts | 99 | | | | | | |
| Keeling P | 24.8 | | | 40 | 1 | 0 | 0 | 0 | | |
| 1981 | | 24:47:30 | | Keeling P & Rylance R | 25 Field Regt. R.A. | 40 | | | | | | |
| Keep G W | 34.5 | | | 76 | 1 | 0 | 0 | 0 | | |
| 1999 | | 34:33:15 | | Keep G W & Wiseman A R | Princess of Wales's Regt | 76 | | | | | | |
| Keeting R | 22.7 | | | 57 | 1 | 0 | 0 | 0 | | |
| 1993 | | 22:43:25 | | Murphy H & Keeting R | Independent | 57 | | | | | | |