| 2019 | ||
| 12-13 October | WRE | Bukowa Cup, Poland. PreO + TempO |
| 29 Nov.- 2 Dec. | First Asian TrailO Championships, Hong Kong (PreO + TempO Q & F + Relay) | |
| 2020 | ||
| 21-22 March | BTOC, near Liphook, SE England | |
| 21-22 March | WRE, ECTO | Hungary |
| 10 April | JK TempO, Stockton | |
| 11 April | JK PreO, Snainton Forest, near Whitby, N.Yorkshire | |
| 24-26 April | WRE, ECTO | Falco Cup, Lithuania |
| 21-24 May | European TrailO Championships, Finland | |
| 19-25 July | O-Ringen TrailO, Uppsala, Sweden | |
| 14-16 August | WRE | Bukowa Cup, Szczecin, Poland TempO + PreO |
| 19-20 September | Nordic Match, Løten, Norway | |
| 10-11 October | WRE, ECTO | Italy |
| 7-8 November | WRE, ECTO | Slovakia |
| 28 Nov. - 5 Dec. | World TrailO Championships, Hong Kong | |
| 2021 | ||
| 20-24 July | World TrailO Championships, Poland |
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)