The longest and hardest of the walks we did on Flinders Island was a loop from The Dock south along the coast and then to the top of Mt Killiecrankie and back to the Dock via dense bush.
It took us two and a half hours to rockhop along the coast to the road inland. From there, it was a wander off-track until we picked up a 4WD track on the lower slopes of Mt Killiecrankie that then became a walking track until the rocky summit.
This is the view from the top of Mt Killiecrankie, looking south, over Killiecrankie Bay.
After a large amount of futile bush bashing in dense scrub, we backtracked to the road and ended up walking 23.5km for the day.