 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
Clarke Joanna | 27.2 | | | 77 | 1 | 0 | 0 | 0 | | |
| 2016 | | 27:11:24 | | Egeland-Jensen Finn Adam & Clarke Joanna | Southampton | 77 | | | | | |  |
Clarke K J | 25.1 | | | 58 | 2 | 0 | 0 | 0 | | |
| 1990 | | 25:27:56 | | Clarke K J & Critchley D | Royal Military Col. of Science | 81 | | | | | |  |
| 1998 | | 24:45:22 | | Clarke K J & Hillsdon T C | Cricket | 35 | | | | | |  |
Clarke N R | 24.4 | | | 64 | 1 | 0 | 0 | 0 | | |
| 1990 | | 24:24:14 | | Clarke N R & Clarke Susan Mary | Basingstoke Canal | 64 | | | | | |  |
Clarke Nathan | 26.1 | | | 48 | 1 | 0 | 0 | 0 | | |
| 2006 | | 26:07:13 | | Lewis Gavin & Clarke Nathan | Cotswold Outdoor.com & Independent | 48 | | | | | |  |
Clarke P D | 24.4 | | | 81 | 1 | 0 | 0 | 0 | | |
| 1988 | | 24:21:42 | | Northway C P & Clarke P D | Bunon | 81 | | | | | |  |
Clarke Peter | 22.4 | | | 38 | 2 | 0 | 0 | 0 | | |
| 2017 | | 25:14:13 | | Colby Daniel & Clarke Peter | Devizes | 61 | | | | | |  |
| 2023 | | 19:28:00 | | Clarke Peter & David Alexander | Devizes | 14 | | | | | |  |
Clarke Peter 3 | 34.0 | | | 100 | 1 | 0 | 0 | 0 | | |
| 2012 | | 33:57:56 | | Hinwood James & Clarke Peter 3 | Trojan Squadron | 100 | | | | | Reserve |  |
Clarke Peter (Teddington) | 18.5 | | | 14 | 2 | 0 | 0 | 0 | | |
| 2022 | | 18:51:08 | | Clarke Peter & Deveruex Michael | Royal Marines Kayak Association | 12 | | | | | |  |
| 2024 | | 18:03:48 | | Clarke Peter & Fooks Juliet | Devizes | 16 | | | | | |  |
Clarke R J | 22.1 | | | 21 | 1 | 0 | 0 | 0 | | |
| 1975 | | 22:06:28 | | Barge M & Clarke R J | Royal Navy | 21 | | | | | |  |
Clarke Richard | 28.1 | | | 87 | 1 | 0 | 0 | 0 | | |
| 2013 | | 28:04:21 | | Dunne Lisa & Clarke Richard | Army Canoe Union | 87 | | | | | |  |
Clarke Sam | 22.9 | | | 34 | 2 | 0 | 0 | 0 | | |
| 2014 | | 22:22:08 | | Carpenter Paul & Clarke Sam | Hereford | 32 | | | | | |  |
| 2017 | | 23:23:28 | | Clarke Sam & Carpenter Paul | Hereford | 35 | | | | | |  |
Clarke Susan Mary | 24.4 | | | 64 | 1 | 0 | 0 | 0 | | |
| 1990 | | 24:24:14 | | Clarke N R & Clarke Susan Mary | Basingstoke Canal | 64 | | | | | |  |
Clay Edward | 22.6 | | | 17 | 1 | 0 | 0 | 0 | | |
| 2008 | | 22:39:38 | | Clay Edward & Willans Adam | Falcon | 17 | | | | | |  |
Clayden S | 21.6 | | | 29 | 1 | 0 | 0 | 0 | | |
| 1985 | | 21:37:47 | | Clayden S & Webb D | Albany Park | 29 | | | | | |  |
Clayton A J | 25.5 | | | 75 | 1 | 0 | 0 | 0 | | |
| 1984 | | 25:32:10 | | Hicks Charles & Clayton A J | Basingstoke Canal | 75 | | | | | |  |
Clayton D | 38.7 | | | 43 | 1 | 0 | 0 | 0 | | |
| 1969 | | 38:43:17 | | Smith G A & Clayton D | Richmond & Chelsea Scouts | 43 | | | | | Scouts |  |
Clayton J | 29.8 | | | 118 | 1 | 0 | 0 | 0 | | |
| 1990 | FB | 29:48:42 | | Clayton J & Chambers N G A | Artists Rifles | 118 | | | | | |  |
Clayton N J | 53.8 | | | 122 | 1 | 0 | 0 | 0 | | |
| 1993 | | 53:49:00 | | Clayton N J & Burns D J | Independent | 122 | | | | | |  |
Clayton Phillip | 27.5 | | | 93 | 1 | 0 | 0 | 0 | | |
| 2010 | | 27:28:18 | | Hollands Paul & Clayton Phillip | Northants | 93 | | | | | |  |
Clements P | 45.7 | | | 57 | 1 | 0 | 0 | 0 | | |
| 1967 | | 45:43:00 | | Pawinski W J & Clements P | Independent | 57 | | | | | |  |
Clements R A | 26.6 | | | 45 | 1 | 0 | 0 | 0 | | |
| 1978 | C2 | 26:33:00 | | Gale K A & Clements R A | 35th Norwich Sea Scouts | 45 | | | | | Canadian |  |
Clements Raymond | 23.8 | | | 44 | 1 | 0 | 0 | 0 | | |
| 2014 | | 23:45:46 | | Clements Raymond & McCourt Jonpaul | Devizes | 44 | | | | | |  |
Clements T | 24.7 | | | 81 | 2 | 0 | 0 | 0 | | |
| 1985 | | 23:56:54 | | Clements T & Cowan R | Southmere Canoe Association | 61 | | | | | |  |
| 1988 | | 25:32:10 | | Clements T & Miller J | Southmere Canoe Association | 100 | | | | | |  |
Clements V | 50.2 | | | 75 | 1 | 0 | 0 | 0 | | |
| 1996 | | 50:10:31 | | Clements V & Raymond M | Independent | 75 | | | | | |  |
Clemson G H | 37.1 | | | 125 | 1 | 0 | 0 | 0 | | |
| 1986 | | 37:05:19 | | Fox G H & Clemson G H | Independent | 125 | | | | | |  |
Clemson K | 22.0 | | | 38 | 1 | 0 | 0 | 0 | | |
| 1986 | | 22:00:53 | | Clemson K & Hawkins J R | Independent | 38 | | | | | |  |
Cleveland Y | 26.6 | | | 99 | 1 | 0 | 0 | 0 | | |
| 1990 | | 26:38:20 | | Chalcraft C D & Cleveland Y | Independent | 99 | | | | | |  |
Clews M | 20.3 | | | 22 | 1 | 0 | 0 | 0 | | |
| 1982 | | 20:19:42 | | Musgrove C & Clews M | Royal Military Col. of Science | 22 | | | | | |  |
Cliff L | 58.1 | | | 54 | 1 | 0 | 0 | 0 | | |
| 1969 | | 58:05:40 | | Cliff L & Motley W P | SEME | 54 | | | | | |  |
Clifford Sarah | 48.4 | | | 93 | 1 | 0 | 0 | 0 | | |
| 1999 | | 48:22:45 | | Webster Lucy Elizabeth & Clifford Sarah | Royal Military Col. of Science | 93 | | | | | |  |
Clist N E | 21.9 | | | 37 | 2 | 0 | 0 | 0 | | |
| 1987 | | 21:11:26 | | Hunt S K & Clist N E | Independent | 34 | | | | | |  |
| 1994 | | 22:38:08 | | Meech S G & Clist N E | Exeter | 39 | | | | | |  |
Clooke Nicholas | 28.9 | | | 52 | 1 | 0 | 0 | 0 | | |
| 2008 | | 28:56:27 | | Clooke Nicholas & Harvey Paul | Independent | 52 | | | | | |  |
Clooney I | 28.9 | | | 65 | 1 | 0 | 0 | 0 | | |
| 1997 | | 28:53:03 | | Clooney I & Williams P I | 24 AirMobile Bde | 65 | | | | | |  |
Clough Daniel | 22.0 | | | 26 | 1 | 0 | 0 | 0 | | |
| 2015 | | 21:58:30 | | Youens Haig & Clough Daniel | Independent | 26 | | | | | |  |
Clow R D | 22.8 | | | 6 | 3 | 0 | 0 | 0 | | |
| 1966 | | 23:32:45 | | Clow R D & Fenton P T | 16 Para | 5 | | | | | |  |
| 1967 | | 21:47:45 | | Clow R D & Fenton P T | 9th Ind Para Sqn RE | 5 | | | | | |  |
| 1969 | | 23:07:41 | | Clow R D & Ashton A | 16 Para | 7 | | | | | |  |
Clow Tom | 24.7 | | | 61 | 3 | 0 | 0 | 0 | | |
| 2007 | | 25:13:54 | | Chapman Leigh & Clow Tom | Royal Marines | 56 | | | | | |  |
| 2009 | | 25:21:17 | | Clow Tom & Hill Jon | Royal Marines | 75 | | | | | |  |
| 2015 | | 23:39:11 | | Clow Tom & Duckitt Jack | Royal Marines | 51 | | | | | |  |
Cloyn-Walters J | 26.4 | | | 69 | 1 | 0 | 0 | 0 | | |
| 1994 | | 26:25:58 | | Cloyn-Walters J & Hill D | Royal Marines Reserve - London | 69 | | | | | |  |
Cluff PD | 21.0 | | | 14 | 1 | 0 | 0 | 0 | | |
| 1997 | | 21:02:23 | | Vaughan K T & Cluff PD | Royal Engineers | 14 | | | | | |  |
Coates Anthony | 20.7 | | | 11 | 1 | 0 | 0 | 0 | | |
| 2005 | | 20:42:10 | | Violino Sean & Coates Anthony | Royal Engineers | 11 | | | | | |  |
Coates G E | 29.6 | | | 111 | 1 | 0 | 0 | 0 | | |
| 1984 | | 29:34:50 | | Coates G E & Anderson M | RAF Coningsby | 111 | | | | | |  |
Coates John | 29.8 | | | 66 | 1 | 0 | 0 | 0 | | |
| 2006 | C2 | 29:45:03 | | Coates Ray & Coates John | North Avon & Independent | 66 | | | | | |  |
Coates Michael | 26.3 | | | 66 | 1 | 0 | 0 | 0 | | |
| 2012 | | 26:16:53 | | Coates Michael & Reid Mark | Independent | 66 | | | | | |  |
Coates N | 20.4 | | | 19 | 1 | 0 | 0 | 0 | | |
| 1989 | | 20:23:51 | | Hampton K & Coates N | Leicester Outdoor Pursuits Club | 19 | | | | | |  |
Coates Ray | 29.8 | | | 66 | 1 | 0 | 0 | 0 | | |
| 2006 | C2 | 29:45:03 | | Coates Ray & Coates John | North Avon & Independent | 66 | | | | | |  |
Cobern R | 30.5 | | | 123 | 1 | 0 | 0 | 0 | | |
| 1990 | | 30:32:35 | | Cobern R & Turner Janet | Pear Drop | 123 | | | | | |  |