| 2020 | ||
| 29 February | British Ranking Event, Thorncombe Wood, Dorchester. Info here | |
| 7-8 March | Lipica Cup, Slovenia, 1 day PreO. No info yet. | |
| 21-22 March | BTOC, near Liphook, SE England. Info here | |
| 21-22 March | WRE, ECTO | Hungary, TempO + PreO. Info here |
| 4-5 April | Silkeborg, Denmark, 2 x PreO + TempO. Info to follow | |
| 10 April | JK TempO, Stockton. All JK TrailO info here | |
| 11 April | JK PreO, Snainton Forest, near Whitby, N.Yorkshire | |
| 18-19 April | WRE, ECTO | Rakov Skocjan, Slovenia, 2 x PreO. No info yet |
| 24-26 April | WRE | Falco Cup, Lithuania. Info here |
| 21-24 May | European TrailO Championships, Lohja, southern Finland. Info here | |
| 19-25 July | O-Ringen TrailO, Uppsala, Sweden | |
| 8-9 August | WRE | Finnish TrailO Championships, PreO + TempO |
| 14-16 August | WRE | Bukowa Cup, Szczecin, Poland TempO + PreO |
| 19-20 September | WRE, ECTO | Nordic Match, Løten, Norway. TempO (not in ECTO) + 2 x PreO |
| 10-11 October | WRE, ECTO | Asiago, Italy, TempO + PreO |
| 7-8 November | WRE, ECTO | Slovakia, TempO + PreO |
| 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)