-These races have attracted the most number of Harrier entrants so far in 2004-
| Race | Harrier Entrants |
| Doug Anderson Memorial 5k | 80 |
| Cranfield 5k | 66 |
| Colworth 5 | 63 |
| Biddenham 10k | 55 |
| St Neots Half Marathon | 55 |
| Bedford Harriers Half Marathon | 45 |
| Blisworth 5 | 43 |
| 3-Counties X-C @ Wing | 41 |
| Standalone 10k | 40 |
| Embankment 5 | 39 |
| 3-countries X-C @ Ampthill | 35 |
| London Marathon | 35 |
| Dave Bithell (Flitwick) 10k | 31 |
| Bedford 6 | 30 |
| Gt North Run | 30 |
| Oakley 20 | 28 |
| Hemel 10 | 27 |
| Cranfield 5 | 27 |
| Nene Valley 10 | 26 |
| Colworth Trail Race | 25 |
| 3-counties X-C @ Wing | 22 |
| Sandy 10 | 20 |
| Woburn Abbey 10k | 20 |
| Rockingham 5 | 20 |