 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
Cornwell Ian | 24.2 | | | 41 | 1 | 0 | 0 | 0 | | |
| 2013 | | 24:11:08 | | Logie Paul & Cornwell Ian | REME & Independent | 41 | | | | | |  |
Cornwell J V | 30.7 | | | 108 | 2 | 0 | 0 | 0 | | |
| 1988 | | 31:29:30 | | Cornwell J V & Maycock D G | Axe Vale & Exeter | 117 | | | | | |  |
| 1989 | | 29:53:07 | | Cornwell J V & Proctor A J | Axe Vale | 99 | | | | | |  |
Cornwell Jon | 26.1 | | | 54 | 2 | 0 | 0 | 0 | | |
| 2002 | | 27:00:34 | | Cornwell Jon & Templing Jonathan | Richmond | 57 | | | | | |  |
| 2011 | | 25:16:57 | | Cornwell Jon & Moody Nick | Richmond | 50 | | | | | |  |
Cornwetl JM | 57.1 | | | 123 | 1 | 0 | 0 | 0 | | |
| 1985 | | 57:08:28 | | Cornwetl JM & Pitts W M | Millfield School | 123 | | | | | |  |
Corps M | 24.2 | | | 45 | 1 | 0 | 0 | 0 | | |
| 1995 | | 24:13:50 | | Corps M & Haycock S | Woodmill | 45 | | | | | |  |
Corr Gary | 24.2 | | | 52 | 2 | 0 | 0 | 0 | | |
| 2014 | C2 | 25:33:42 | | Corr Gary & Corr Ginette | Bristol Empire Dragons | 74 | | | | | |  |
| 2017 | C2 | 22:49:47 | | Corr Gary & Kruszelnicki Peter | Paddle Sport | 30 | | | | | |  |
Corr Ginette | 25.6 | | | 74 | 1 | 0 | 0 | 0 | | |
| 2014 | C2 | 25:33:42 | | Corr Gary & Corr Ginette | Bristol Empire Dragons | 74 | | | | | |  |
Corso Jill | 26.1 | | | 64 | 1 | 0 | 0 | 0 | | |
| 2013 | | 26:04:10 | | Barlow Liz & Corso Jill | Sedbergh And District | 64 | | | | | |  |
Cosgrove N | 22.4 | | | 26 | 1 | 0 | 0 | 0 | | |
| 1999 | | 22:24:48 | | Cosgrove N & Smith J R R | Richmond | 26 | | | | | |  |
Cosh A M | 22.0 | | | 35 | 2 | 0 | 0 | 0 | | |
| 1985 | | 23:35:59 | | Cosh A M & Perrington P S | Griffon | 59 | | | | | |  |
| 1996 | | 20:31:30 | | Sanders Keith & Cosh A M | Griffon | 10 | | | | | |  |
Coslett T | 24.2 | | | 40 | 4 | 0 | 0 | 0 | | |
| 1980 | | 24:27:18 | | Porter T & Coslett T | Wey & Tonbridge | 43 | | | | | |  |
| 1981 | | 25:40:57 | | Lawton CD & Coslett T | Wey | 46 | | | | | |  |
| 1982 | | 23:07:24 | | Coslett T & Wamock S | Southampton University | 47 | | | | | |  |
| 1983 | | 23:37:14 | | Coslett T & Hawkins S | RAF CA | 23 | | | | | RAF |  |
Cotterill Henry | 22.8 | | | 22 | 3 | 0 | 0 | 0 | | |
| 2026 | | 22:46:38 | | Cotterill Henry & West Thomas | Recc | 22 | | | | | |  |
| 2026 | | 22:46:38 | | Cotterill Henry & West Thomas | Recc | 22 | | | | | |  |
| 2026 | | 22:46:38 | | Cotterill Henry & West Thomas | Recc | 22 | | | | | |  |
Cottle G J | 22.4 | | | 18 | 2 | 0 | 0 | 0 | | |
| 1972 | | 21:02:12 | | Cottle G J & Bainton G | Bradford On Avon Rowing C | 8 | | | | | |  |
| 1998 | | 23:48:24 | | Dark A C & Cottle G J | Bradford On Avon Rowing C | 27 | | | | | Veteran |  |
Cotton Matthew | 27.1 | | | 88 | 1 | 0 | 0 | 0 | | |
| 2017 | | 27:04:38 | | Cotton Matthew & Bairstow James | Independent | 88 | | | | | |  |
Cotton Nick | 23.9 | | | 46 | 2 | 0 | 0 | 0 | | |
| 2012 | | 24:30:18 | | Cotton Nick & Smee Tim | Bromley & Independent | 49 | | | | | |  |
| 2015 | | 23:19:22 | | Smee Tim & Cotton Nick | Independent & Richmond | 43 | | | | | |  |
Cotton Stephen | 24.5 | | | 46 | 5 | 0 | 0 | 0 | | |
| 2011 | | 29:51:41 | | Cain Andrew & Cotton Stephen | Wey Kc & Bradford On Avon | 95 | | | | | |  |
| 2017 | | 28:11:37 | | Cotton Stephen & Cain Andrew | Gloucester | 97 | | | | | |  |
| 2026 | | 21:32:50 | | Kershaw Ian & Cotton Stephen | Gloucester & Bradford on Avon | 13 | | | | | |  |
| 2026 | | 21:32:50 | | Kershaw Ian & Cotton Stephen | Gloucester & Bradford on Avon | 13 | | | | | |  |
| 2026 | | 21:32:50 | | Kershaw Ian & Cotton Stephen | Gloucester & Bradford on Avon | 13 | | | | | |  |
Couchman K | 38.3 | | | 45 | 1 | 0 | 0 | 0 | | |
| 1961 | | 38:21:30 | | Couchman K & Morgan P | JLR RAC | 45 | | | | | |  |
Coulon S J | 26.9 | | | 35 | 1 | 0 | 0 | 0 | | |
| 1975 | | 26:51:29 | | Piercey R & Coulon S J | Amersham Canoe Trekkers | 35 | | | | | |  |
Coulson Andrew | 36.3 | | | 97 | 7 | 0 | 0 | 0 | | |
| 1991 | | 48:01:25 | | Ainsworth P & Coulson Andrew | Independent | 114 | | | | | |  |
| 1997 | | 30:02:04 | | Ainsworth P & Coulson Andrew | Independent | 69 | | | | | |  |
| 1999 | | 41:38:15 | | Coulson Andrew & Mulliner Magnus | Independent | 91 | | | | | |  |
| 2011 | | 36:23:32 | | Coulson Andrew & Mulliner Magnus | Independent | 109 | | | | | |  |
| 2013 | | 32:54:15 | | Coulson Andrew & Hunt Stephen | Associated British Ports | 94 | | | | | |  |
| 2016 | | 32:01:52 | | Coulson Andrew & Neligan Gary | Associated British Ports | 92 | | | | | |  |
| 2017 | | 33:07:43 | | Coulson Andrew & Mulliner Magnus | Associated British Ports | 107 | | | | | |  |
Coulson G | 29.8 | | | 44 | 1 | 0 | 0 | 0 | | |
| 1998 | FB | 29:45:07 | | Coulson G & Abrutat D J | Royal Marines Reserve | 44 | | | | | Tyne |  |
Coulson P | 34.7 | | | 24 | 1 | 0 | 0 | 0 | | |
| 1962 | | 34:42:00 | | Wood W & Coulson P | RAF Cranwell | 24 | | | | | |  |
Court M L | 24.5 | | | 84 | 1 | 0 | 0 | 0 | | |
| 1988 | | 24:30:59 | | Bathgate P & Court M L | RMA Sandhurst | 84 | | | | | |  |
Courtaux Nicholas | 29.2 | | | 112 | 1 | 0 | 0 | 0 | | |
| 2009 | | 29:13:16 | | Courtaux Nicholas & Funnell Len | Marlow | 112 | | | | | |  |
Courtier I | 24.5 | | | 52 | 3 | 0 | 0 | 0 | | |
| 1985 | | 28:27:36 | | Courtier I & Monk T | West Cumbria | 92 | | | | | |  |
| 1990 | | 22:43:01 | | Courtier I & Harte J | West Cumbria | 39 | | | | | |  |
| 1991 | | 22:21:09 | | Courtier I & Pickthall J B | West Cumbria | 24 | | | | | |  |
Courtier P | 19.5 | | | 12 | 2 | 0 | 0 | 0 | | |
| 1988 | | 20:09:59 | | Platt J C & Courtier P | West Cumbria | 19 | | | | | |  |
| 1989 | | 18:56:01 | | Platt J C & Courtier P | West Cumbria | 5 | | | | | |  |
Courtman A | 20.5 | | | 4 | 1 | 0 | 0 | 0 | | |
| 1972 | | 20:31:07 | | Courtman A & Cook A J | Newham | 4 | | | | | |  |
Cousins Leonie | 23.3 | | | 22 | 1 | 0 | 0 | 0 | | |
| 1998 | | 23:16:05 | | Merrifield Clive & Cousins Leonie | Taunton | 22 | | | | | |  |
Couton S J | 25.6 | | | 19 | 1 | 0 | 0 | 0 | | |
| 1976 | | 25:38:35 | | Piercey R & Couton S J | Amersham Canoe Trekkers | 19 | | | | | |  |
Coutts D F | 25.5 | | | 11 | 1 | 0 | 0 | 0 | | |
| 1966 | | 25:31:20 | | Medicott C J & Coutts D F | Culham College | 11 | | | | | |  |
Cowan R | 23.9 | | | 61 | 1 | 0 | 0 | 0 | | |
| 1985 | | 23:56:54 | | Clements T & Cowan R | Southmere Canoe Association | 61 | | | | | |  |
Coward P S | 36.9 | | | 66 | 2 | 0 | 0 | 0 | | |
| 1983 | | 50:37:39 | | Coward P S & Dowe A D | Poole Harbour | 72 | | | | | |  |
| 1987 | | 23:13:26 | | Coward P S & Walters D D | Poole Harbour | 60 | | | | | |  |
Coward R | 24.5 | | | 61 | 1 | 0 | 0 | 0 | | |
| 1984 | | 24:27:27 | | Cuss P & Coward R | TYM | 61 | | | | | |  |
Cowen Christopher | 27.3 | | | 96 | 1 | 0 | 0 | 0 | | |
| 2014 | | 27:15:34 | | Cowen Christopher & Tompsett Malcolm | Independent | 96 | | | | | |  |
Cowper Freddie | 21.7 | | | 15 | 1 | 0 | 0 | 0 | | |
| 2006 | | 21:41:45 | | Cowper Freddie & McEloy Richard | Artists Rifles | 15 | | | | | Reserve |  |
Cox Ben | 23.1 | | | 26 | 1 | 0 | 0 | 0 | | |
| 2006 | | 23:08:35 | | Cox Ben & Steele Al | RMA Sandhurst | 26 | | | | | |  |
Cox D | 22.8 | | | 45 | 2 | 0 | 0 | 0 | | |
| 1984 | | 22:25:34 | | Cox D & Jonas A | Bristol & Reading | 36 | | | | | |  |
| 1986 | | 23:12:30 | | Bowles P J & Cox D | Gillingham | 53 | | | | | |  |
Cox Gareth | 25.4 | | | 75 | 1 | 0 | 0 | 0 | | |
| 2015 | | 25:23:57 | | Cox Gareth & Hurdman Dean | Acu - Royal Engineers | 75 | | | | | |  |