It's 60-year-old Fiona's time to shine. She's a fitness instructor, runner, horse rider and now a champion powerlifter, and she tests the group's mettle with her challenging hike to beautiful Rubha Hunish, the northernmost point of the island.

After 30 years on Skye, Fiona is fiercely proud of her adopted north Skye home. Her 8.5km walk along the headland is a birdwatcher's paradise, with epic cliff top views stretching miles out to sea.

But they need to navigate the blustery coastline and a knee-trembling scramble down a steep cliff along the way. Can Fiona power through to the finish to claim the prize?

Mischievous musician Innes's 8km mountain walk starts with a climb over the lower ridges of Bruach na Frithe in the Cullin range, before following a meandering river with its myriad pools through the Glen of Sligachan.

The landscape inspired a lockdown album for Innes with its dramatic views of the mountains and the loch below, so will its inspirational views be enough to bag the big prize?

But there may be a be a swarm of tiny problems. It's midge season on Skye, and the boggy terrain of the Glen of Sligachan is heaven for the flying insects – so will it be trouble in paradise as they threaten to wreak havoc?