The County Marathon, established in 2003, is an annual event held in Prince Edward County, Ontario. It features a full marathon and half marathon, both certified by Athletics Canada, making them qualifiers for major marathons like the Boston Marathon. The event showcases the scenic beauty of the county, including picturesque lake views, rolling hillsides, and local wineries.

In 2025, the event will introduce a 5K Fun Run and reintroduce the popular 2 to 5 Person Marathon Relay, offering something for everyone from competitive runners to fun runners and teams.

- Relatively flat marathon course passing through three villages and alongside three lakes
- Water stations every 3 km in first half and every 2 km in second half
- GU Gels provided at every station in the second half
- Toilets at every water station
- Full medical services on route and at finish line
- Marathon time limit of 6 hours
- Road surface throughout

- Certified full and half marathons serving as qualifiers for major events like Boston Marathon
- Scenic route through Prince Edward County villages, lakes, and wineries
- Introduction of a 5K Fun Run in 2025
- Reintroduction of 2 to 5 Person Marathon Relay
- Beautiful autumn scenery in early October