Biggest races where rider never competed
Major races where Isla Thomas never competed in.
| # | Race | Class |
|---|---|---|
| 1 | World Championships WE - Road Race | WC |
| 2 | La Flèche Wallonne Féminine | CDM |
| 3 | Giro Donne | 2.1 |
| 4 | Ronde Van Vlaanderen / Tour Des Flandres WE | CDM |
| 5 | Trofeo Alfredo Binda - Comune di Cittiglio | CDM |
| 6 | GP de Plouay-Bretagne | CDM |
| 7 | Holland Ladies Tour | 2.2 |
| 8 | World Championships WE - ITT | WC |
| 9 | Univé Worldcup Ronde van Drenthe | CDM |
| 10 | Giro Della Toscana Int. Femminile | 2.1 |
| 11 | Open de Suède Vårgårda | CDM |
| 12 | Omloop Het Volk WE | 1.2 |
| 13 | Internationale Thuringen Rundfahrt der Frauen | 2.1 |
| 14 | Tour de l'Aude Cycliste Féminin | 2.1 |
| 15 | Iurreta-Emakumeen Bira | 2.2 |
| 16 | Durango-durango Emakumeen Saria | 1.2 |
| 17 | Drentse 8 Van Dwingeloo | 1.1 |
| 18 | Open de Suède Vårgårda TTT | CDM |
| 19 | Novilon Eurocup Ronde Van Drenthe | 1.1 |
| 20 | Gent-Wevelgem WE | 1.2 |
| 21 | Grand Prix Elsy Jacobs | 1.1 |
| 22 | Strade Bianche Donne | 1.1 |
| 23 | Olympic Games WE - Road Race | Olympics |
| 24 | Giro del Trentino Alto Adige - Südtirol | 2.1 |
| 25 | La course by Le Tour de France | 1.1 |