All available race results Natalio Dorronsoro
| Date | Race | Rank |
| 05/10 | Vuelta a Guipúzcoa | 21 |
Rider information for 1924
| Rank | 1028 |
| Score | 0 |
| Name | Natalio DORRONSORO |
| Country | Spain |
| Team | S.C. Bolarindian |
| Date | Race | Rank |
| 10/05 | G.P. Vizcaya | 8 |
| 24/06 | Vuelta a Tolosa | 16 |
| Vuelta al Pais Vasco | ||
| 09/08 | General Classification | 31 |
Rider information for 1925
| Rank | 394 |
| Score | 45 |
| Name | Natalio DORRONSORO |
| Country | Spain |
| Team | A.C. Bilbao |