A list of 6 day races currently planned for 2021 depending of course on how the covid situation develops.
| 14.-20.03.2021 | 6 Days UMF Winter Edition | 6d | Policoro | ITA |
| 21-3-21 | Douglas 6 Day Race (Info) | 6d | Douglas, AZ | USA |
| April TBC | Sri Chinmoy 10 & 6 Day Races | 10/6d | New York | USA |
| 18.-24.04.2021 | XVIè 6 Jours de France | 6d | Privas | FRA |
| May TBC | 16th Ultramarathon Festival | 6d,48h,24h | Loutraki | GRE |
| 06.-12.05.2021 | 10th EMU 6 Day World Trophy | 6d | Balatonfüred | HUN |
| 10.-16.05.2021 | 5th 3 Days at the Fair 6 Days Race | 6d | Augusta, NJ | USA |
| 04.-10.07.2021 | Les 6 Jours du Grand Est | 6d | Pont-à-Mousson | FRA |
| 05.-11.07.2021 | Kauhajoki Ultra Running Festival 6d,72/48/24/12/6h | 6d,72/48/24/12/6hour | Kauhajoki | FIN |
| 24.-30.07.2021 | Six Days in the Dome – The Redux | 6d,48h,24h | Milwaukee, WI | USA |
| 13.-19.09.2021 | 1st Viadal Ultra Six Days | 6d | Förslöv | SWE |
| 26.09.2021 | Adelaide 6 day – 6 Day, 72h, 48h | 6d,72h,48h | Adelaide, SA | AUS |
| 28.12.2021-03.01.2022 | Across the years, 6d (USA) | 6d,72h,48h,24h | Phoenix, AZ | USA |