Day four of the Swisse Mark Webber Tasmania Challenge started with a steep 16km mountain bike leg up Mt Field which started at 100m above sea level and finished at 1000m above sea level.
Once at the top, competitors set off for a 15km run leg along Lake Dobson and the alpine plateau. For the brave, some competitors choseto go onto Lions Den where competitors had to clamber over boulders to get to an optional check point.
From the plateau, competitors descent the mountain into another orienteering course through Russell Falls and Tall Trees Walk, before abike leg along Gordon River Road for the one paddle leg of the day.
Competitors covered a distance of over 80kms.