All available race results Louis Dethier
| Date | Race | Rank |
| 13/06 | Bruxelles - Les Waleffes | 16 |
Rider information for 1909
| Rank | 1496 |
| Score | 0 |
| Name | Louis DETHIER |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| Tour de Belgique | ||
| 21/05 | Stage 1 | 43 |
| 23/05 | Stage 2 | 46 |
| 19/06 | Circuit Jemeppien | 9 |
Rider information for 1911
| Rank | 765 |
| Score | 6 |
| Name | Louis DETHIER |
| Country | Belgium |
| Team | Individual |