| Peak Raid 3 Round 2 | Sun 1st Nov 2015 | 1/87 | 02:59:04 | See all Duncan Harris at Peak Raid 3 Round 2 |
| High Peak 40 | Sat 21st Sep 2013 | 1/143 | 05:26:13 | See all Duncan Harris at High Peak 40 |
| High Peak 40 | Sat 15th Sep 2012 | 1/161 | 05:40:00 | See all Duncan Harris at High Peak 40 |
| Round Rotherham Run | Sat 16th Oct 2010 | 1/247 | 06:29:35 | See all Duncan Harris at Round Rotherham Run |
| Fellsman | Sat 8th May 2010 | 1/400 | 11:00:00 | See all Duncan Harris at Fellsman |