Info
| Last name | van Witzenburg-de Groot |
| First name | Marieke |
| Nationality |  Netherlands |
| Date of birth | 29-10-1985 |
| Age | 40 |
Monuments
Grand tours
| Year | Giro d'Italia | Tour de France | Vuelta a España |
|---|---|---|---|
| 2020 | - | - | 54th |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 22-08 | 54 |  Egmont Cycling Race Women (1.2) | |||||
| 18-08 | 99 | Konvert Koerse (1.1) | |||||
| 15-08 | 67 | Grote Prijs Yvonne Reynders (1.2) | |||||
| 03-08 | 9 | Profwielerronde Oostvoorne (CRTP) | |||||
 Princess Anna Vasa Tour (2.2) | |||||||
| 66 |  Standings | ||||||
| 30-07 | 49 | Stage 3Golub-Dobrzyn - Golub-Dobrzyn (14.0km) | |||||
| 29-07 | Stage 2Golub-Dobrzyn - Golub-Dobrzyn (123.0km) | ||||||
| 28-07 | 78 | Stage 1Golub-Dobrzyn - Golub-Dobrzyn (111.0km) | |||||
| Baloise Ladies Tour (2.1) | |||||||
| 76 | Standings | ||||||
| 16-07 | 82 | Stage 4Deinze - Deinze (121.0km) | |||||
| 15-07 | 90 | Stage 3aBreskens - Knokke-Heist (82.0km) | |||||
| 15-07 | 75 | Stage 3bKnokke-Heist - Knokke-Heist (17.0km) | |||||
| 14-07 | 98 | Stage 2Zulte - Zulte (116.0km) | |||||
| 13-07 | 70 | Stage 1Zwevegem - Zwevegem (119.0km) | |||||
| 12-07 | 130 | PrologueVlissingen - Vlissingen (2.0km) | |||||
| 10-06 | 53 | Elmos Dwars door het Hageland (1.1) | |||||
| 21-05 | 26 | Antwerp Port Epic Ladies (1.1) | |||||
| 06-05 | 92 | GP Eco-Struct/Thompson/Security Tools (1.1) | |||||
| 29-04 | 49 | Leiedal Koerse (1.2) | |||||
| 10-04 | DNF | Ronde de Mouscron (1.1) | |||||
Teams
Victories
| This year | 0 |
| Total | 0 |