| 2018 | ||
| 1-3 August | WRE | Falco Cup, Lithuania. PreO WRE on Day 3. Bulletin 2 (final details) here |
| 4-11 August | World TrailO Championships, Latvia. Bulletin 2 here | |
| 16-19 August | Hungaria Cup, Tapolca, Hungary. 4 days of PreO, can be combined with FootO events. Info here | |
| 22 August | Cerkno Cup, Slovenia. PreO (combined with FootO event). Information here | |
| 25 or 26 August | White Rose Weekend PreO, Duncombe Park, Helmsley. Information here | |
| 2 September | BO Ranking Event | East Harptree Woods, nr. Stockhill (after British Middle Champs.) |
| 22-23 September | ECTO | ECTO 7 & 8: Denmark (Silkeborg, Jutland). 2 x PreO. Information here |
| 6-7 October | ECTO+WRE | ECTO 9 & 10: Czech Republic. PreO WRE + TempO WRE. Same venue as FootO World Cup |
| 26-31 December | Gran Canaria O-meeting, includes 1 day of TrailO. Information here | |
| 2019 | ||
| 23-29 June | World TrailO Championships, Idanha-a-Nova, Portugal. Bulletin 1 here | |
| 2020 | ||
| early November | World TrailO Championships, Hong Kong |
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)