The Sixfoot Track Marathon is a 45km trail run through the Blue Mountains, from The Explorer's Marked Tree, near Katoomba to Jenolan Caves.
The popular trail run began in 1984 and attracts more than 850 runners each year - with the event regularly selling out in advance.
Entrants have 7 hours to finish the trail marathon with the average participant taking 5hrs 30 mins or more to run the Blue Mountains course.
Qualifying criteria apply due to the challenging nature of the event, so be sure to check the event website for further entry details.
We attempt to ensure all details listed are correct at the time of publishing but note that some details may have changed since. Confirm details via event organiser website to be sure.