Former Essendon player Mark Bolton will take on perhaps his greatest ever sporting challenge when he tackles the Melbourne Ironman this Sunday.

The long-time CEO of youth homelessness charity Ladder will take part in the ironman event, widely considered the ultimate test of an athlete. The event will see the former 124 AFL-gamer swim 3.8km in the ocean, bike ride 180km and run a 42.2km marathon.

Ladder is an independent non-profit organisation established in 2007 to tackle youth homelessness in Australia. Essendon skipper Jobe Watson is an ambassador for Ladder, and a number of Essendon players are annually involved in their social projects.

Bolton is undertaking the gruelling endurance event to fundraise for the charity, with a target of $10,000.

Essendon Football Club has financially pledged its support behind Bolton and the charity, and is encouraging Bomber fans to do the same.

Click here to read more information on the event.