31 July   Scottish 6-Days TrailO, Drummond Castle, Crieff. Info on S6D website
26 August   British TrailO Champs. + 'Standard' course, Scarborough (linked with White Rose w/e). Info here
13-15 September ECTO+WRE Polish TrailO Championships, Wlen, Poland. TempO + PreO
5-6 October ECTO+WRE Nordic Match, Landvetter, close to Gøteborg airport, Sweden. Night PreO + 2 x PreO
12-13 October WRE Bukowa Cup, Poland. PreO + TempO
29 Nov- 2 Dec   First Asian TrailO Championships, Hong Kong (PreO + TempO Q & F + Relay)
early November   World TrailO Championships, Hong Kong
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)