If you're looking to conquer every one of Scotland's Munros, these are some of the trickiest peaks you'll have to face.
There are a total of 282 Munros in Scotland and bagging them all is a huge challenge – equivalent to climbing Mount Everest 14 times – completed by only the most dedicated walkers and climbers.
It’s thought that less than 7,000 so-called 'compleatists', or Munroists, have finished the epic challenge to date, making it a fairly exclusive club.
Many of the peaks can be scaled by anybody with a reasonable level of fitness, but some are more challenging prospects suitable only for those with experience and a head for heights.
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The mighty Cuillin mountain range on the Isle of Skye is the location of the most fearsome Munro in Scotland. It's not the mountain of Sgùrr Dearg (meaning 'red peak') that's the problem - it's the 50-metre high Inaccessible Pinnacle that tops it, which you have to deal with before claiming the summit. The 'Inn Pin' is the only peak that requires rock climbing equipment (along with a fair amount of bravery) to conquer.
Here are the 10 Munros that are the most difficult to tick off your list.
Before you set out on any expedition make sure you are aware of the latest advice from Scottish Mountain Rescue and plan accordingly.
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It's a challenge just getting to Ladhar Bheinn as it sits in the middle of the Knoydart peninsula, which isn't reachable by road. Access it via the path along Loch Hourn (pictured) or catch a boat from Mallaig and overnight on the peninsula.
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Another challenging peak in Skye's Cuillins range, all routes up Sgurr nan Gillean have sections that require a scramble and are certainly not for the faint-hearted.
Generally regarded as the most remote Munro, A'Mhaighdean rises above the wilderness of Fisherfield in northwest Scotland, to the south of Ullapool. It takes most people several days to get there and back, so camping equipment is a must, with popular routes including a start around Loch a'Bhraoin (pictured).
Negotiating Aonach Eagach, the trickiest peak around Glen Coe, requires Munro baggers to tackle what's reputed to be mainland Britain's narrowest ridge, including some potentially-scary scrambles.
Another huge challenge on Syke's Cuillin Ridge, Sgurr Alasdair is the highest peak on the Black Cuillin and requires some potentially perilous scrambling to reach the summit.
Another peak that's challenging due to its location rather than height, Mullach na Dheiragain is one of the least climbed Munros due to its remoteness. A boat trip along Loch Mullardoch (pictured), followed by a steep trek is one option to get there.
Relatively innocuous on a clear day, Beinn Dorain is challenging due to the thick mist that often clings to its summit, confusingly located a few hundred feet from a foolishly-.located large cairn. Many of those who think they have climbed it, actually haven't.
Towering in the middle of the Torridon Hills, in the northwest Highlands, Liathach actually comprises two Munros - Mullach an Rathain and Spidean a' Choire Leith. Both have steep ascents, while traversing the ridge linking the two requires a real head for heights, with sheer drops seemingly in all directions.
In the heart of the Cairngorms (as its name - meaning 'middle hill' suggests), Beinn Mheadhoin can also claim to be very much in the middle of nowhere. There's no speedy way to reach it, with a hike of nearly 20km required before you ascend the tricky summit.