| Urban Nights Race 2 | Thu 15th Nov 2012 | 10/20 | 00:35:18 | See all Karl Marshall at Urban Nights Race 2 |
| Club Championships (Flouch) | Sat 10th Nov 2012 | 15/62 | 01:35:13 | See all Karl Marshall at Club Championships |
| Royal Dungworth | Sat 29th Sep 2012 | 4/37 | 00:40:29 | See all Karl Marshall at Royal Dungworth |
| Sheffield Way Relay | Sun 23rd Sep 2012 | 3/14 | 01:22:57 | See all Karl Marshall at Sheffield Way Relay |
| Burbage Summer Sharpener 3 | Wed 1st Aug 2012 | 5/25 | 01:34:43 | See all Karl Marshall at Burbage Summer Sharpener 3 |
| Bamford | Wed 18th Jul 2012 | 23/136 | 00:36:38 | See all Karl Marshall at Bamford |
| Broomhead Chase | Sun 15th Jul 2012 | 11/64 | 00:32:04 | See all Karl Marshall at Broomhead Chase |
| Hathersage | Mon 9th Jul 2012 | 46/221 | 00:37:21 | See all Karl Marshall at Hathersage |
| Blackamoor Chase | Wed 20th Jun 2012 | 51/202 | 00:51:56 | See all Karl Marshall at Blackamoor Chase |
| Hunshelf Amble | Sun 17th Jun 2012 | 12/ | 00:56:26 | See all Karl Marshall at Hunshelf Amble |