All available race results Piet van der Horst
| Date | Race | Rank |
| 22/03 | Den Haag - Brussel | 4 |
| 29/07 | World Championships Road Race (Amateurs) | 16 |
Rider information for 1926
| Rank | 347 |
| Score | 60 |
| Name | Piet VAN DER HORST |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 06/04 | Den Haag - Brussel | 7 |
Rider information for 1930
| Rank | 743 |
| Score | 11 |
| Name | Piet VAN DER HORST |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 19/04 | Den Haag - Brussel | 2 |
Rider information for 1931
| Rank | 509 |
| Score | 27 |
| Name | Piet VAN DER HORST |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 10/04 | Den Haag - Brussel | 1 |
Rider information for 1932
| Rank | 506 |
| Score | 31 |
| Name | Piet VAN DER HORST |
| Country | Netherlands |
| Team | Individual |
No results available in season 1935.
Rider information for 1935
| Rank | 1741 |
| Score | 0 |
| Name | Piet VAN DER HORST |
| Country | Netherlands |
| Team | Magneet |