 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
|---|
 Inocco Ryan | 25.1 | | | 65 | 1 | 0 | 0 | 0 | | |
| 2014 | | 25:05:31 | | Inocco Ryan & Styles Tom | Marlow | 65 | | | | | | |
| Inskip D J | 29.4 | | | 87 | 2 | 0 | 0 | 0 | | |
| 1992 | | 34:51:55 | | Inskip D J & Dawson A | Stonehenge | 107 | | | | | | |
| 1993 | | 24:00:40 | | Heath Roger & Inskip D J | Stonehenge | 67 | | | | | | |
| Ironside J | 33.4 | | | 16 | 1 | 0 | 0 | 0 | | |
| 1962 | | 33:23:45 | | Britton G & Ironside J | RAF South Cerney | 16 | | | | | | |
| Irvine Brett | 20.6 | | | 17 | 1 | 0 | 0 | 0 | | |
| 2009 | | 20:38:04 | | Irvine Brett & Pople Claire | Richmond | 17 | | | | | | |
| Irvine J | 18.2 | | | 4 | 1 | 0 | 0 | 0 | | |
| 1998 | | 18:11:56 | | Vaughan K T & Irvine J | Royal Engineers | 4 | | | | | Army,Services | |
| Irving J | 25.1 | | | 32 | 1 | 0 | 0 | 0 | | |
| 1996 | | 25:04:30 | | Irving J & Bayles J | Royal Engineers | 32 | | | | | | |
| Irwin Gareth | 20.8 | | | 10 | 1 | 0 | 0 | 0 | | |
| 2013 | | 20:49:04 | | Lay Christopher & Irwin Gareth | Army Canoe Union | 10 | | | | | Army,Services | |
| Irwin William | 25.1 | | | 69 | 1 | 0 | 0 | 0 | | |
| 2015 | | 25:03:31 | | Irwin William & O Hanrahan Feargal | Wwkc Ireland | 69 | | | | | | |
| Isaac Jason | 19.2 | | | 4 | 1 | 0 | 0 | 0 | | |
| 2004 | | 19:10:49 | | Dunn Stuart & Isaac Jason | Leaside | 4 | | | | | | |
| Ivall S | 25.1 | | | 38 | 1 | 0 | 0 | 0 | | |
| 1997 | | 25:09:02 | | Ivall S & Warren B | Independent | 38 | | | | | | |
| Ivanics Casaba | 22.1 | | | 21 | 1 | 0 | 0 | 0 | | |
| 2013 | | 22:05:19 | | Ivanics Casaba & Lenart Jozsef | Ealing & Cardiff Bay Kayakers | 21 | | | | | | |
| Ive P S | 27.4 | | | 54 | 1 | 0 | 0 | 0 | | |
| 1997 | | 27:21:29 | | Pentland M J P & Ive P S | Independent | 54 | | | | | | |
| Ives Tim | 22.9 | | | 22 | 11 | 0 | 0 | 0 | | |
| 1996 | | 36:31:10 | | Ives Tim & Lyle I C | Manchester & Salford University OTC | 60 | | | | | | |
| 2002 | | 21:29:52 | | Ives Tim & Blessley Iain | RMA Sandhurst | 15 | | | | | | |
| 2003 | | 24:02:03 | | Cheeseman Guy & Ives Tim | Royal Engineers | 13 | | | | | | |
| 2013 | FB | 26:08:59 | | Martell Charles & Ives Tim | Army Canoe Union | 65 | | | | | | |
| 2014 | | 20:45:25 | | Ives Tim & Lawson Iain | Army Canoe Union | 14 | | | | | | |
| 2017 | | 20:12:59 | | Lay Christopher & Ives Tim | Royal Engineers | 9 | | | | | | |
| 2019 | | 20:50:49 | | Ives Tim & Lawson Iain | Army | 15 | | | | | Army | |
| 2023 | | 19:42:40 | | Ives Tim & Lawson Iain | RE | 18 | | | | | Army,Services | |
| 2026 | | 20:47:21 | | Ives Tim & Lawson Iain | Recc | 12 | | | | | | |
| 2026 | | 20:47:21 | | Ives Tim & Lawson Iain | Recc | 12 | | | | | | |
| 2026 | | 20:47:21 | | Ives Tim & Lawson Iain | Recc | 12 | | | | | | |
| Ives Tim (Teddington) | 18.8 | | | 11 | 1 | 0 | 0 | 0 | | |
| 2022 | | 18:50:02 | | Ives Tim & Lawson Iain | Royal Engineers | 11 | | | | | Army | |
| Ivey R | 37.4 | | | 39 | 1 | 0 | 0 | 0 | | |
| 1973 | | 37:25:25 | | Moore R & Ivey R | | 39 | | | | | | |
| Ivil A M | 42.0 | | | 27 | 1 | 0 | 0 | 0 | | |
| 1960 | | 41:57:00 | | Hutchison J & Ivil A M | 10 Para | 27 | | | | | | |
| Jackman R W | 36.0 | | | 53 | 1 | 0 | 0 | 0 | | |
| 1998 | | 36:02:24 | | Jackman R W & Goodwin A P L | Independent | 53 | | | | | | |
| Jacks P | 22.1 | | | 25 | 3 | 0 | 0 | 0 | | |
| 1995 | | 23:59:15 | | Jacks P & Wilson I P | Independent | 43 | | | | | | |
| 1997 | | 21:42:44 | | Wilson I P & Jacks P | Harlow Outdoor Pursuits | 23 | | | | | | |
| 1999 | | 20:38:50 | | Wilson I P & Jacks P | Harlow Outdoor Pursuits | 9 | | | | | | |
| Jackson A | 22.0 | | | 25 | 2 | 0 | 0 | 0 | | |
| 1990 | | 20:17:23 | | Marsland D & Jackson A | Royal Engineers | 13 | | | | | | |
| 1999 | | 23:44:56 | | Jackson A & Humphries P | 1 Para | 37 | | | | | | |
| Jackson Andrew | 24.2 | | | 53 | 2 | 0 | 0 | 0 | | |
| 2014 | | 22:46:05 | | De Klerk Tiaan & Jackson Andrew | ACU Parachute Regiment | 36 | | | | | | |
| 2017 | | 25:37:04 | | Gargan Frank & Jackson Andrew | Parachute Regiment | 69 | | | | | | |
| Jackson Andrew (Teddington) | 21.1 | | | 27 | 1 | 0 | 0 | 0 | | |
| 2022 | | 21:03:42 | | Jackson Andrew & Bahadur Khati Lal | Royal Engineers | 27 | | | | | | |
| Jackson C | 25.1 | | | 33 | 1 | 0 | 0 | 0 | | |
| 1996 | | 25:06:50 | | Jackson C & Barnes S J | Royal Electrical & Mechanical Engineers | 33 | | | | | | |
| Jackson Caroline Louise | 18.6 | | | 15 | 1 | 0 | 0 | 0 | | |
| 1993 | | 18:39:35 | | Jordan D S & Jackson Caroline Louise | Maidstone | 15 | | | | | | |
| Jackson J R | 24.9 | | | 24 | 2 | 0 | 0 | 0 | | |
| 1969 | | 27:21:00 | | Nagy M & Jackson J R | 7 Para RHA | 24 | | | | | | |
| 1975 | | 22:23:21 | | Fisher R P & Jackson J R | 7 Para RHA | 23 | | | | | | |
| Jackson James | 23.1 | | | 16 | 1 | 0 | 0 | 0 | | |
| 2025 | | 23:08:28 | | Jackson James & Forrest Adam | Exeter | 16 | | | | | | |
| Jackson Jennie | 70.2 | | | 67 | 1 | 0 | 0 | 0 | | |
| 1998 | | 70:14:42 | | Jackson Jennie & Jackson Rachael | Chippenham Unit Scc | 67 | | | | | | |
| Jackson John | 20.6 | | | 14 | 1 | 0 | 0 | 0 | | |
| 2017 | | 20:33:00 | | Jackson John & Victor-Trott Theo | Hereford | 14 | | | | | | |
| Jackson John B | 29.0 | | | 4 | 2 | 0 | 0 | 1 | | |
| 1952 | FB | 34:25:00 | | Simmons Anthony & Jackson John B | Western Bay | 3 | | | | 1 | | |
| 1963 | | 23:31:44 | | Jackson John B & Gautier Charles | Western Bay Ex | 5 | | | | | Civilian | |
| Jackson Kathryn | 26.0 | | | 64 | 1 | 0 | 0 | 0 | | |
| 1994 | | 25:58:21 | | Jackson P G & Jackson Kathryn | Warren | 64 | | | | | | |
| Jackson Margaret | 36.5 | | | 56 | 1 | 0 | 0 | 0 | | |
| 1978 | | 36:30:30 | | Jackson P & Jackson Margaret | Westel | 56 | | | | | | |
| Jackson P | 29.4 | | | 36 | 4 | 0 | 0 | 0 | | |
| 1967 | | 28:43:30 | | Jackson P & Groves H | RMA Sandhurst | 31 | | | | | | |
| 1968 | | 28:27:00 | | Jackson P & Gibb A H | RMA Sandhurst | 16 | | | | | | |
| 1978 | | 36:30:30 | | Jackson P & Jackson Margaret | Westel | 56 | | | | | | |
| 1979 | | 23:50:25 | | Simmons J & Jackson P | L T R West Westel | 41 | | | | | Veteran | |
| Jackson P G | 29.1 | | | 87 | 3 | 0 | 0 | 0 | | |
| 1990 | | 30:11:43 | | Jackson P G & Bannister T | 1st Purley Scout Troop | 120 | | | | | | |
| 1991 | | 31:09:50 | | Stephens Kathryn Anne & Jackson P G | Warren | 76 | | | | | | |
| 1994 | | 25:58:21 | | Jackson P G & Jackson Kathryn | Warren | 64 | | | | | | |
| Jackson P1 | 33.3 | | | 130 | 1 | 0 | 0 | 0 | | |
| 1990 | | 33:16:22 | | Jackson P1 & Moss T | 12 Air Defence Regiment R.A. | 130 | | | | | | |
| Jackson Paul | 26.0 | | | 76 | 1 | 0 | 0 | 0 | | |
| 2017 | | 25:59:51 | | Jackson Paul & Whitehead Robert Devereux | 3Rd Newbury | 76 | | | | | | |
| Jackson R | 46.2 | | | 51 | 1 | 0 | 0 | 0 | | |
| 1961 | | 46:13:00 | | Colley J & Jackson R | 36 GW Regt RA | 51 | | | | | | |
| Jackson Rachael | 70.2 | | | 67 | 1 | 0 | 0 | 0 | | |
| 1998 | | 70:14:42 | | Jackson Jennie & Jackson Rachael | Chippenham Unit Scc | 67 | | | | | | |
| Jackson Richard | 30.9 | | | 118 | 1 | 0 | 0 | 0 | | |
| 2009 | | 30:53:52 | | Murphy Martin & Jackson Richard | Independent | 118 | | | | | | |
| Jackson S | 24.7 | | | 69 | 1 | 0 | 0 | 0 | | |
| 1990 | | 24:44:30 | | Johnston S C & Jackson S | Royal Marines | 69 | | | | | | |
| Jackson S N | 27.6 | | | 24 | 1 | 0 | 0 | 0 | | |
| 1976 | | 27:37:08 | | Smith J G & Jackson S N | 8 Sig.Regt | 24 | | | | | | |