The 2024 WMOC is scheduled Aug 2-9 at Turku, Finland.
https://www.wmoc2024.fiFive year age classes are offered and run from W35 to W100, and M35 to M100. Anyone (age 35+) can enter. Events are as follows: Sprint Model, Sprint Qualification races, Sprint Final; Forest Model, Forest Qualification races, Middle Final, Long Final. The Qualification races seed you into an A, B, or C etc. final. Top 80 in an age class goes into the A Final, next 80 into the B, etc. So if you don't make the A final, don't worry, you can have a great run in the B! There is also a 5-day public competition for younger family members or anyone else.
The 2023 WMOC is scheduled this year Aug 11-18 in Kosice, Slovakia, with similar format.
https://www.wmoc2020.sk.
The WMOC is great fun, has something for everyone, gives one the chance to experience all kinds of different terrains, and to meet other orienteers from all over the world.