| 2020 | ||
| 8-9 August | WRE | Finnish TrailO Championships, SW of Tampere, Finland. PreO + TempO. Details (in Finnish) here |
| 14-16 August | Bukowa Cup, Szczecin, Poland. TempO + PreO (not now WRE) | |
| 19-20 September | WRE, ECTO | Nordic Match, Løten, Norway. TempO (not in ECTO) + 2 x PreO |
| 25-27 September | WRE | Falco Cup, Rykantai, Lithuania. TempO + 2 x PreO + Sprint PreO. Details here |
| 3-4 October | WRE, ECTO | Rak TrailO, Rakov Skocjan, Cerknica, Slovenia. 2 x Preo. Details here |
| 10-11 October | WRE, ECTO | Siben TrailO Cup, Asiago, Italy, TempO + PreO + Sprint PreO. Details here |
| 17-18 October | WRE | FIN TrailO, Turku, Finland. TempO + PreO + Sprint PreO. Details here |
| 7-8 November | WRE, ECTO | Slovakia TrailO Weekend, TempO + PreO + Sprint PreO. Details here |
| 14-15 November | WRE, ECTO | Hungarian TrailO, Vas, Hungary. TempO + PreO |
| 2021 | ||
| 12-16 May | European TrailO Championships 2020, Espoo, Finland | |
| 20-24 July | World TrailO Championships, Poland | |
| 2022 | ||
| 1-7 July | World TrailO Championships, Zakupy, Czech Republic | |
| 3-7 August | European TrailO Championships, Turku, Finland |
WRE = IOF World Ranking Event
ECTO = European Cup in TrailO
The following events usually have one or more TrailO competitions along with FootO competitions:
Portugal O-meet, February (PreO)
Lipica Open, Slovenia (PreO)
JK, Easter weekend (TempO + PreO)
British Orienteering Championships and British TrailO Championships (PreO) on the same weekend, same venue
Wawel Cup, Poland, July (PreO)
Swedish O-Ringen, July (5 x PreO)
Scottish 6-Days, July-August (PreO)
Hungaria Cup, August (4 x PreO)
Cerkno Cup, Slovenia, August (PreO)
White Rose Weekend, August (PreO)