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Ruadh Stac Mòr

918m Ullapool

“Big Red Stack”

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Photo: GeographBot · CC BY-SA 2.0

About this Munro

Ruadh Stac Mòr is a Munro rising to 918m near Ullapool. It is a serious and committing mountain day requiring experience. Expect a long, remote day with limited escape options. Underfoot conditions are often wet and pathless. It is commonly climbed as part of a wider Munro circuit. Weather and visibility can significantly affect the experience.

The Climb

Your journey to Ruadh Stac Mòr is an epic adventure into the heart of the Fisherfield wilderness, one of Scotland's most…

Your journey to Ruadh Stac Mòr is an epic adventure into the heart of the Fisherfield wilderness, one of Scotland's most remote and challenging mountain environments. The route from Corrie Hallie Layby via Shenavall covers an intimidating 42.5 kilometres, making this the longest walk in this entire collection. The difficulty rating of 5 out of 5 is thoroughly deserved, as you'll navigate pathless, boggy terrain rated at 4 out of 5 for wetness across vast expanses of trackless moorland. Ruadh Stac Mòr sits at 918 metres at the heart of the Fisherfield circuit, typically climbed alongside multiple neighbouring Munros in what represents one of Scottish hillwalking's ultimate challenges. The approach alone takes several hours before you even begin ascending Ruadh Stac Mòr proper, crossing rough ground with tussocky grass, peat hags, and waterlogged sections. Allow between 10.9 and 14.2 hours for the full circuit, and be prepared for this to extend further in poor conditions. This is wilderness walking at its most serious and committing.

When to Climb

Timing your ascent of Ruadh Stac Mòr requires careful consideration of daylight hours, making the summer months of May…

Timing your ascent of Ruadh Stac Mòr requires careful consideration of daylight hours, making the summer months of May through July virtually essential for most walkers. The extreme length of the route means you'll need maximum daylight, with the long June days providing the best window for completing this marathon safely. Even in midsummer, you'll likely be walking in dawn and dusk light, so headtorches are essential equipment for Ruadh Stac Mòr. Winter attempts are extraordinarily serious undertakings suitable only for the most experienced mountain marathoners, with short daylight making completion in a single day extremely challenging. The Ullapool region experiences high rainfall throughout the year, with Ruadh Stac Mòr's remote location meaning weather systems sweep across with little warning. Spring and autumn can provide excellent conditions, though you'll sacrifice some daylight hours. The boggy terrain becomes even more challenging after prolonged rainfall, so choose a period of settled weather with firm forecasts. Many experienced walkers camp at Shenavall bothy or wildcamps in the area, splitting the route over two days to make Ruadh Stac Mòr more manageable and enjoyable.

Getting There

Your adventure to Ruadh Stac Mòr begins at the Corrie Hallie Layby on the A832 between Braemore Junction and Dundonnell,…

Your adventure to Ruadh Stac Mòr begins at the Corrie Hallie Layby on the A832 between Braemore Junction and Dundonnell, a remote spot with limited parking. The layby is approximately 12 miles from Garve and can fill quickly during peak season, so arrive very early to secure a space. From here, you'll face a long walk-in to Shenavall, the ruined bothy that serves as the gateway to Ruadh Stac Mòr and the Fisherfield peaks. The approach to Shenavall itself covers around 8 kilometres of estate track, giving you a taste of the commitment required for this mountain. Corrie Hallie represents the end of civilisation, with no facilities whatsoever at the trailhead. The nearest services are in Ullapool, approximately 45 minutes' drive north, or Garve to the south. Mobile phone signal is non-existent at the parking area and throughout most of the route to Ruadh Stac Mòr. Ensure your vehicle is reliable and you have sufficient fuel, food, and water before leaving the main settlements. This is as remote as Scottish hillwalking gets.

At the Summit

The summit of Ruadh Stac Mòr rises to 918 metres, its name 'Big Red Stack' referencing the Torridonian sandstone that…

The summit of Ruadh Stac Mòr rises to 918 metres, its name 'Big Red Stack' referencing the Torridonian sandstone that gives the mountain its distinctive warm colouring. Standing atop this remote peak, you'll experience one of Scotland's wildest and most spectacular summit panoramas, with barely a sign of human presence in any direction. The summit cairn of Ruadh Stac Mòr provides a sense of achievement that few other mountains can match, given the extraordinary effort required to reach it. Views extend across the trackless Fisherfield wilderness to An Teallach's jagged ridge to the north, while Slioch guards the eastern approaches to this wild territory. The summit area is relatively exposed with little natural shelter, making this an uncomfortable place in strong winds. On clear days, the coastline is visible to the northwest, while countless peaks and lochans fill the view in every direction. The remoteness of Ruadh Stac Mòr creates a profound sense of wilderness that is increasingly rare in the Scottish Highlands, making this summit experience truly special for those who reach it.

Wildlife & Nature

The journey to Ruadh Stac Mòr takes you through some of Scotland's most pristine wilderness, where nature operates…

The journey to Ruadh Stac Mòr takes you through some of Scotland's most pristine wilderness, where nature operates largely undisturbed by human activity. The approach through the lower glens passes areas where scattered pines and birches provide remnants of ancient woodland, home to red deer that thrive in this vast estate. As you progress towards Ruadh Stac Mòr, you'll traverse extensive blanket bog dominated by sphagnum mosses, cotton grass, and heather, creating the wetland habitat that makes this route so challenging underfoot. Golden eagles hunt across this remote terrain, and you stand a better chance of spotting these magnificent birds here than in most of Scotland. The area around Ruadh Stac Mòr supports healthy populations of mountain hares, their coats turning white in winter against the snow. At higher elevations, montane plants like dwarf willow, crowberry, and alpine clubmoss cling to the thin soils between sandstone outcrops. The Ullapool region's high rainfall creates lush moss and lichen growth on rocks throughout the route. Ptarmigan inhabit the summit areas above 900 metres, while ravens and buzzards are constant aerial companions in this wilderness.

Essential Tips

Attempting Ruadh Stac Mòr requires expedition-level planning and preparation, as this is far beyond a typical day's…

Attempting Ruadh Stac Mòr requires expedition-level planning and preparation, as this is far beyond a typical day's hillwalking. Your navigation skills must be exceptional, with the ability to navigate accurately across featureless, pathless terrain in poor visibility being absolutely essential. Carry map, compass, and GPS with spare batteries, and ensure you're completely confident in their use before attempting Ruadh Stac Mòr. The extreme length of the route demands excellent physical fitness and mental resilience, as you'll be on your feet for 11-14 hours or more. Pack substantial quantities of food and water, or be prepared to filter from mountain streams. Emergency shelter and bivvy equipment are essential safety items for Ruadh Stac Mòr, as being caught out overnight is a real possibility if injury or severe weather strikes. Mobile phone signal is absent throughout the route, so your emergency plan must be robust and shared with someone responsible. Many experienced walkers camp at Shenavall or in the wilderness, making this a two-day expedition. Consider this approach for Ruadh Stac Mòr, as it transforms an extreme challenge into a more enjoyable and safer wilderness experience. Never underestimate this mountain's serious and remote nature.

Routes & Navigation

1 route available for Ruadh Stac Mòr. Download the app for GPS tracks and live conditions.

Fisherfield circuit from Shenavall

Very Hard
10.9–14.2h round trip42.5km distance
Difficulty 5/5Bog: BoggyParking: Corrie Hallie Layby

Frequently Asked Questions

Common questions about climbing Ruadh Stac Mòr.

How tall is Ruadh Stac Mòr?

Ruadh Stac Mòr stands at 918 metres (3,012 feet), making it the 276th tallest of all 282 Munros in Scotland.

What does Ruadh Stac Mòr mean in Gaelic?

The name Ruadh Stac Mòr translates from Scottish Gaelic as “Big Red Stack”.

How long does it take to climb Ruadh Stac Mòr?

Depending on the route and conditions, climbing Ruadh Stac Mòr typically takes between 10.9 and 14.2 hours round trip. The Munros app provides detailed time estimates for each route.

Where do I park for Ruadh Stac Mòr?

The nearest parking for Ruadh Stac Mòr is at Corrie Hallie Layby. Check the Munros app for detailed parking coordinates and live conditions.

How difficult is Ruadh Stac Mòr to climb?

Ruadh Stac Mòr is rated Very Hard (difficulty 5/5). Route difficulty varies — check the Munros app for detailed ratings on each route.

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