As an AI language model, I do not have real-time data on ongoing or upcoming events and marathons worldwide. However, some major health and fitness events and marathons that usually take place annually in different locations are:
1. Boston Marathon – Boston, USA
2. New York City Marathon – New York, USA
3. London Marathon – London, UK
4. Berlin Marathon – Berlin, Germany
5. Tokyo Marathon – Tokyo, Japan
6. Chicago Marathon – Chicago, USA
7. Paris Marathon – Paris, France
8. Honolulu Marathon – Honolulu, USA
9. Big Sur International Marathon – California, USA
10. Comrades Marathon – South Africa
It is advisable to check with the respective event organizers for the latest updates and schedules.
