 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
Cope R | 72.5 | | | 154 | 1 | 0 | 0 | 0 | | |
| 1988 | | 72:27:06 | | Cope R & Anderson Tracy | Independent | 154 | | | | | |  |
Copelin Maria | 47.3 | | | 142 | 1 | 0 | 0 | 0 | | |
| 1988 | C2 | 47:20:30 | | Copelin Maria & Burrage I E D | Brighton Sea Cadet Corps & High Wycombe Sea Cadet Corps | 142 | | | | | |  |
Copner J D | 35.8 | | | 112 | 1 | 0 | 0 | 0 | | |
| 1992 | | 35:47:41 | | Simons Melissa & Copner J D | Oxford University | 112 | | | | | |  |
Coppard Lesley | 26.3 | | | 53 | 1 | 0 | 0 | 0 | | |
| 1979 | | 26:18:18 | | Coppard Lesley & Brunt Carol | Longridge | 53 | | | | | |  |
Corbet Burcher Alex | 22.2 | | | 36 | 1 | 0 | 0 | 0 | | |
| 2010 | | 22:12:00 | | Corbet Burcher Alex & Simpson Matthew | Welsh Guards | 36 | | | | | |  |
Corbett A | 30.9 | | | 75 | 2 | 0 | 0 | 0 | | |
| 1981 | | 36:44:04 | | Corbett A & Lovely W | Royal Oak Windsor | 85 | | | | | |  |
| 1982 | | 25:09:42 | | Corbett A & Bradfield A | Royal Oak Windsor | 64 | | | | | |  |
Corbin D J | 34.7 | | | 96 | 1 | 0 | 0 | 0 | | |
| 1982 | | 34:41:38 | | Rex A K & Corbin D J | Independent | 96 | | | | | |  |
Corden Darron | 20.0 | | | 8 | 2 | 0 | 0 | 0 | | |
| 2014 | | 20:21:06 | | Corden Darron & Smith Ian | Worcester | 10 | | | | | |  |
| 2016 | | 19:39:06 | | Corden Darron & Smith Ian | Worcester | 6 | | | | | Century,Lee |  |
Corfield M | 34.5 | | | 105 | 1 | 0 | 0 | 0 | | |
| 1992 | | 34:29:20 | | Sycha A B & Corfield M | Reading and Leighton Park | 105 | | | | | |  |
Corfield Rupert | 28.7 | | | 95 | 1 | 0 | 0 | 0 | | |
| 2019 | | 28:44:08 | | Burdett James & Corfield Rupert | Independent | 95 | | | | | |  |
Cormack Hamish | 27.8 | | | 31 | 1 | 0 | 0 | 0 | | |
| 2003 | | 27:49:54 | | Cormack Hamish & Grainger Brendan | RMA Sandhurst | 31 | | | | | |  |
Cormack I A | 55.8 | | | 82 | 1 | 0 | 0 | 0 | | |
| 1983 | | 55:48:00 | | Painter W G & Cormack I A | 81 Ordnance Coy. | 82 | | | | | |  |
Corncroft M | 33.5 | | | 31 | 1 | 0 | 0 | 0 | | |
| 1961 | | 33:28:00 | | Corncroft M & Howgate A | RMA Sandhurst | 31 | | | | | |  |
Corner A J | 22.9 | | | 54 | 1 | 0 | 0 | 0 | | |
| 1989 | | 22:55:24 | | Corner A J & Pimm M | Hemel Hempstead & H.A.W.K.S. | 54 | | | | | |  |
Cornhill Phil | 31.6 | | | 107 | 1 | 0 | 0 | 0 | | |
| 2015 | | 31:38:48 | | Cornhill Phil & Williams Marc | Independent | 107 | | | | | |  |
Cornish Peter | 25.8 | | | 45 | 1 | 0 | 0 | 0 | | |
| 2006 | | 25:46:45 | | Cornish Peter & Crosby-Jones Stephen | RMA Sandhurst | 45 | | | | | |  |
Cornish Tim | 17.1 | | | 2 | 8 | 4 | 2 | 1 | | |
| 1975 | | 18:55:05 | | Cornish Tim & Nash S R | Richmond & Reading | 5 | | | | | |  |
| 1977 | | 17:47:58 | | Greenham Brian & Cornish Tim | Royal | 3 | | | | 1 | |  |
| 1978 | | 16:50:51 | | Greenham Brian & Cornish Tim | Leighton Park School & Richmond | 1 | | 1 | | | Civilian |  |
| 1979 | | 15:34:12 | | Greenham Brian & Cornish Tim | Reading and Leighton Park & Richmond | 1 | | 1 | | | Civilian |  |
| 1980 | | 16:15:48 | | Greenham Brian & Cornish Tim | Reading and Leighton Park & Richmond | 1 | | 1 | | | Civilian |  |
| 1984 | | 17:22:07 | | Cornish Tim & Viljoen G | Independent | 1 | | 1 | | | Civilian |  |
| 1994 | | 15:50:18 | | Belcher R J & Cornish Tim | Independent | 2 | | | 1 | | Civilian,Lee,Overseas |  |
| 2011 | | 18:28:22 | | Cornish Tim & Harding Ollie | Longridge | 2 | | | 1 | | Century,Lee |  |
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 | | | | | |  |