The route for day one starts ominously in a car park opposite a graveyard. The climb to the start of the trail warms up leg muscles before the real riding beginsPhotograph: Tom Humpage/guardian.co.ukThe route centres around the cliffs at Quiraing - Cuith-raing in Celtic - with steep drops and stunning viewsPhotograph: Tom Humpage/guardian.co.ukScotland’s trails are open access, which means mountain-bikers can literally ride on anything. As the singletrack gets narrower, guide Euan Wilson plunges aheadPhotograph: Tom Humpage/guardian.co.ukBecause the trails are not purpose built for mountain-bikers, some sections are impossible to ride and bikes have to be carriedPhotograph: Tom Humpage/guardian.co.ukAs the weather closes in, the mist begins to obscure the view, the path - and the dropPhotograph: Tom Humpage/guardian.co.ukScree slopes provide for some challenging ridingPhotograph: Tom Humpage/guardian.co.ukRiding on Skye throws everything at you at once - as soon as you get to grips with the technical nature of the riding, visibility is suddenly reduced to nothing by the mistPhotograph: Tom Humpage/guardian.co.ukSteep gradients mean weight distribution on the bike becomes essential - a fall to the right and you would be rolling for quite a whilePhotograph: Tom Humpage/guardian.co.ukOn the south of the island, the scenery, while still dramatic, opens up more. The route chosen by Euan followed an old mining trail out to Boreraig - the last crofting village to be vacated on Skye as part of the Highland Clearances in 1853Photograph: Tom Humpage/guardian.co.ukFrom the mud of Quiraing to the grassy and rocky routes on southern Skye. Gentler riding means more time to admire the sceneryPhotograph: Tom Humpage/guardian.co.ukEuan Wilson against the stunning backdrop of the QuaPhotograph: Tom Humpage/guardian.co.ukThe trail to Boreraig followed a 200-year-old marble mining route across moorlandPhotograph: Tom humpage/guardian.co.ukThe final descent to the beach at Boreraig - famous for its fossils - takes in both rocky singletrack and wet fieldsPhotograph: Tom Humpage/guardian.co.ukSheep dodging becomes a useful skill as the outlines of the ruined village come into viewPhotograph: Tom Humpage/guardian.co.uk