What is the Cuillin Round?
The Cuillin Round is one of the most formidable and exhilarating mountain ultra running challenges in the UK, nestled in the rugged landscape of the Isle of Skye in Scotland. This spectacular link-up of peaks around Glen Sligachan is renowned for being the "Ultimate Rock & Run" 24-hour challenge, which from my experience from completing it, involves the same effort required as any 24-hour ultra running challenge in the UK, such as the Bob Graham Round, Ramsay's Round, Paddy Buckley Round etc. The Cuillin Ridge is often known for being extremely technical and hard to navigate, but in essence, this is only about half of the challenge. The Cuillin Round traverses along the Red Cuillin's, Garbh Bheinn, Clach Glas, Bla Bheinn along with Sgurr na Strii and many other peaks in between.
The Details
The 24-hour 'Rock and Run' challenge is a grueling adventure across the Isle of Skye's iconic Cuillin range, involving a combination of running and scrambling. This intense route covers around 37 miles (60 kilometers) with an ascent totalling over 7,500 meters. The challenge includes summiting 60 Cuillin tops, which features a dozen Munros (mountains in Scotland over 3,000 feet) and an equal number of Munro tops, including the well-known Knight's Peak.
The route demands a high level of endurance fitness, navigation skills, and experience in scrambling. Although no technical climbing (i.e., using ropes and other climbing gear) is required, participants will encounter sustained, exposed scrambling up to a difficulty level comparable to traditional climbing grades, roughly around Diff (Difficult) standard. Due to the nature of the terrain and the aim to complete the round in under 24 hours, this challenge is typically undertaken as an un-roped scramble.
Rob Woodall, who first devised the route in 1999, managed to complete it in 23 hours and 28 minutes. He suggests that anyone who requires roped assistance might find a sub-24-hour completion too challenging and should consider taking on the route at a more leisurely pace instead. Yiannis Tridimas, the only other person known to have attempted this round, completed it in 21 hours and 21 minutes in 2000. He even added an additional top to the route, bringing the total to 60 tops. I then completed this challenge in June 2023 and managed to reduce the time to 19 hours and 39 minutes. Finlay Wild, who I can only imagine was inspired by my completion in 2023 managed to reduce the time even more to a new record of 13 hours and 4 minutes in May 2024.
The addition was inspired by the Trans-Cuillin route, which includes 70 tops, prompting a desire to maintain a round number for this particular challenge. Despite its impressive nature, this round has seen very few attempts, making it a rare and distinguished accomplishment in the world of ultra-running and mountain scrambling. I completed this and set a new record under 2 weeks before having an attempt at the Cuillin Round, the reason being, that I was fit, recovered and the weather was perfect. Find out more on this BLOG.
The Terrain of the Cuillin Round
The Black Cuillin
The Black Cuillin Ridge, located on the Isle of Skye in Scotland, is one of the most iconic and challenging mountain ranges in the UK. Known for its dramatic, jagged peaks, the ridge stretches approximately 12 kilometers (about 7.5 miles) and includes 11 Munros, which are Scottish mountains over 3,000 feet (914.4 meters) and 12 Munro tops, including the Knights Peak. The ridge is composed primarily of gabbro rock, which is renowned for its grip and rough texture, making it favourable for scrambling. However, the route is also marked by significant exposure and technical sections that require a high level of mountaineering experience. Completing the full traverse of the Black Cuillin Ridge is a major undertaking that demands not only physical fitness but also skills in rock climbing and navigation, making this the ultimate ultra running challenge for anyone who loves mixing climbing and scrambling with endurance running.
For ultra-runners, the Black Cuillin Ridge represents the pinnacle of technical mountain running challenges, let alone adding on additional sections such as the Red Cuillins, Clach Glas traverse and Sgurr na Sti, which sits in Sligachan's picturesque glen. Unlike traditional ultra-marathons, which may focus primarily on distance and endurance, the Black Cuillin Ridge and Cuillin Round involves extensive sections of scrambling and climbing, often up to Moderate or Difficult rock climbing grades. Runners must be prepared to navigate narrow ridges, vertical drops, and steep ascents and descents, all while managing the physical demands of a long-distance run. The terrain requires constant attention, as loose rocks and the exposed nature of the ridge can present significant risks. Ultra-running on the Black Cuillin Ridge is about more than just speed; it’s about the ability to move efficiently and safely through complex and often treacherous mountain terrain.
Successfully running the Black Cuillin Ridge demands a unique blend of skills, including endurance, agility, and technical climbing ability. The weather on the Isle of Skye can change rapidly, adding another layer of difficulty, with rain, wind, and mist frequently transforming the ridge into a hazardous environment. Ultra-runners tackling the Black Cuillin Ridge must be well-prepared for these conditions, as they not only test physical stamina but also mental fortitude and decision-making under pressure. Completing the Cuillin Round in a single push is a rare achievement, showcasing an athlete's capability to conquer one of the UK's most formidable mountain challenges.
The Red Cuillin
Contrasting sharply with the Black Cuillin, the Red Cuillin consists of gentler, rounded hills made primarily of granite. This section provides a slight reprieve in terms of technical difficulty but is no less demanding physically. The Red Cuillin requires long, steep ascents and descents across grassy, often boggy terrain, where footing can be uncertain and energy-sapping.
A notable climb on this part of the round is Glamaig, this impressive mountain rises just over 800 meters from sea level and it feels continuously steep, with its rough slopes, this is a real test of mental fortitude to climb, however, it's impressive 360 views from the summit is regarded as one of the finest in all of Scotland.
The Red Cuillin allows for faster movement compared to the Black Cuillin, but the risk of navigation errors increases due to the less defined paths. However, this part of the round allows runners to recover slightly before tackling the more strenuous sections again.
Garbh bheinn, Clach Glas Traverse and Blabheinn
The Garbh Bheinn, Clach Glas, and Blàbheinn (also known as Blaven) traverse on the Isle of Skye is a challenging and scenic route that provides a captivating experience for ultra runners. This route begins with an ascent of Garbh Bheinn, a rugged and less-travelled peak that offers stunning views over the surrounding landscapes, including the rest of the Cuillin range. Garbh Bheinn's rocky slopes and steep inclines set the tone for the rest of the traverse, testing runners’ stamina and technical abilities right from the start.
Moving from Garbh Bheinn, the route continues to Clach Glas, often referred to as the "Matterhorn of Skye" due to its sharp, pointed shape and the sheer, steep nature of its rock faces. Clach Glas presents a series of scrambles that require careful navigation and a good head for heights. The technical challenges increase as ultra runners make their way over its knife-edge ridges, where solid footing and strong scrambling skills are essential. The traverse between Clach Glas and Blàbheinn includes exposed sections that demand both physical and mental agility, making this segment a highlight for those seeking a true mountain adventure.
The final part of the traverse ascends Blàbheinn, one of Skye’s most iconic peaks. Known for its breathtaking panoramic views, Blàbheinn offers sightlines that extend to the entire Cuillin Ridge and beyond, providing a rewarding climax to the run. The ascent of Blàbheinn involves more scrambling and steep climbing, but reaching its summit offers a sense of accomplishment and the chance to take in the full grandeur of the island's rugged beauty. Completing the Garbh Bheinn, Clach Glas, and Blàbheinn traverse as an ultra run requires not only endurance and speed but also the ability to handle exposed, technical terrain with confidence. It's a route that offers a blend of intense physical challenge and the unparalleled beauty of Skye's mountains, making it a prized route for seasoned ultra runners and mountain enthusiasts.
Sgurr Hain & Sgurr na Stri
Sgùrr Hain and Sgùrr na Stri offer a unique ultra-running experience on the Isle of Skye, combining rugged terrain with some of the most breathtaking views in Scotland. Sgùrr Hain, though not one of the tallest peaks, provides a challenging ascent with rocky paths and steep inclines, making it an excellent warm-up for the more demanding parts of the run. The trail towards Sgùrr Hain winds through dramatic landscapes, characterized by sharp rocks and heather-covered slopes, giving runners a taste of the wild and untamed beauty of Skye. Despite its lower elevation, the summit rewards runners with panoramic views of the surrounding Cuillin range and the serene waters of Loch Coruisk, making the effort well worth it.
Continuing to Sgùrr na Stri, ultra runners face one of the most spectacular viewpoints in Scotland. Sgùrr na Stri, known for its iconic vistas, offers unparalleled views over Loch Coruisk and the jagged peaks of the Cuillin mountains. The route up Sgùrr na Stri involves steep climbs and sections of scrambling, requiring good navigation skills and a head for heights. The terrain is rough and uneven, demanding both physical endurance and careful footwork. Reaching the summit of Sgùrr na Stri is a pinnacle moment for ultra runners, as they are greeted by sweeping views that stretch out over the island and towards the mainland. This combination of challenging, technical running and the chance to experience one of the most beautiful landscapes in the UK makes the Sgùrr Hain and Sgùrr na Stri ultra run a truly unforgettable adventure.
When I completed the Cuillin Round on 1st June 2023, I decided to start at the bottom of the Bla Bhein Ridge and go clockwise (Sgurr Hain and Sgurr na Stri first, followed by The Cuillin Ridge). I decided to do it this way for several reasons, but the first would be that I could sleep in my car in the car park at Kilmarie (about 4km away) and simply wake up and walk into the base of the ridge of Bla Bheinn to start the round. The second reason was that it meant I had some slightly smaller hills to do before starting the technical difficulties of The Cuillin Ridge, along with travelling clockwise meant that I would tackle all of these as you would normally too. Finally, apart from finishing on Clach Glas (which I had to do in the dark), most of the hills are easily navigated and my thought was that if I was tired, I would have to make any technically demanding decisions. The day out was incredible and the terrain and scenery that you encounter during the attempt has to be some of the best scenery in the United Kingdom, but only if you get the right weather window!
Navigation and Technical Skills Required
Navigating the Cuillin Ridge is notoriously difficult, even for seasoned mountaineers. The ridgeline is complex and convoluted, with numerous spurs and ridges that can easily lead to disorientation, especially in poor visibility. Many sections of the ridge require scrambling (a mix between hiking and rock climbing), and some require full climbing equipment, including ropes, helmets, and harnesses. A solid understanding of mountaineering techniques, as well as proficiency in map reading and the use of a compass, is essential for safely completing the route.
Navigational Flow on the Cuillin Ridge
Preparing for the Cuillin Round
Physical Preparation
Preparing physically for the Cuillin Round involves a comprehensive training regime that builds endurance, strength, agility, and technical climbing skills and at James Gibson Coaching, I offer bespoke coaching to help you increase performance for Ultra Challenges like this one and with first-hand experience, I can offer advice like no one else can.
Given the elevation gain and the duration of the challenge, cardiovascular fitness is crucial. Training should include long-distance trail running, hill repeats, and strength training focusing on the legs and core. Building endurance over varied terrains, such as rocky paths, boggy ground, and steep ascents, is essential to mimic the conditions found on the Cuillin Ridge.
Strength training should incorporate exercises that develop lower body power and core stability. Plyometric exercises, like box jumps and lunges, can improve explosive strength, which is crucial for scrambling and navigating steep descents safely. Agility drills, including ladder drills and cone drills, enhance footwork and reaction time, vital for the uneven terrain of the ridge.
Technical Skills Training
Technical skills are as vital as physical fitness for the Cuillin Round. Participants should have experience with rock scrambling and be comfortable with exposed positions. It is advisable to undertake specific rock climbing training to handle the Inaccessible Pinnacle and other climbing sections. Practice on similar ridgelines, or guided courses in mountaineering, can provide valuable experience and build confidence, I offer all of these courses and with over half a decade working on the Cuillin Ridge on the Isle of Skye, I've helped clients complete full traverse and completed many Skye Munro courses with folk.
Navigation Skills
Navigation is a critical component of preparing for the Cuillin Round. The ridge's complex terrain requires a high level of proficiency in map reading, compass use, and understanding topographical features takes a long time to learn, it took me over half a decade to learn all of the best lines, but I would say around two years were focusing on the lines that you need to ultra run The Cuillin Round and a large proportion of that was waiting for the right weather window and the right amount of time off to have an attempt.
Gear and Equipment
Proper gear is essential for a successful and safe Cuillin Round attempt. Lightweight, weather-resistant clothing like that from INOV8 is necessary due to the changeable weather conditions. Layering is vital to adjust to the varying temperatures experienced during the challenge. Waterproof jackets and pants, insulated layers, and moisture-wicking base layers are recommended.
Footwear should be durable, offer good grip, and be suitable for both scrambling and running, I found that the INOV8 Roclite 275's were perfect and gave a comfortable and grippy feel for the entire attempt. Trail running shoes with sticky rubber soles, designed for rock, are often chosen for their blend of grip and agility.
A high-energy nutrition plan is also crucial. Quick-digesting carbohydrates, energy gels, nuts, and protein bars help maintain energy levels throughout the challenge. Hydration is equally important, with only a few options to fill up water along the route, it's certainly worth knowing where these are. Think about it choosing the right weather conditions too if it's too hot, you'll likely need more water and if you're attempting it solo/ unsupported like myself and Finlay Wild, you'll not be able to cache any food or water for the attempt.
What to Expect During the Cuillin Round
Weather Conditions
The Isle of Skye is notorious for its unpredictable weather, which can change rapidly and dramatically. Ultra runners should be prepared for all weather conditions, including rain, wind, fog, and even snow, regardless of the season, but I'd highly recommend attempting in conditions anything but perfect. The ridge's exposed nature means that conditions can feel much harsher than at sea level, with strong winds and sudden temperature drops being common.
The Experience of the Cuillin Round
Embarking on the Cuillin Round is as much an emotional journey as it is a physical one. The challenge presents an opportunity to push personal limits and experience the rugged beauty of the Scottish Highlands in its most raw and undisturbed form. From the moment ultra runners start their journey, wherever that may be as there is no set starting location, they are immersed in a landscape that is both unforgiving and breathtaking.
Pacing and Time Management
Managing pace and time is crucial to completing the Cuillin Round within the target window of 24 hours. Most participants start their attempt in the early morning to maximize daylight hours, as navigating the ridge in darkness significantly increases the challenge. Efficient pacing involves balancing speed with safety, particularly on technical sections where rushing can lead to mistakes, which can most certainly lead to fatality.
Ultra runners often break the route into smaller sections, setting short-term goals to manage energy levels and maintain morale. Regular, brief rest stops for hydration and nutrition are essential to sustain physical and mental stamina. Monitoring the weather and adapting pace accordingly can also be critical, especially if conditions are forecasted to deteriorate.
Post-Challenge Recovery
Immediate Recovery Steps
After completing the Cuillin Round, it is essential to focus on recovery. The intense physical exertion requires replenishment of energy stores and rehydration. Consuming a balanced meal rich in carbohydrates, protein, and electrolytes aids in muscle recovery and reduces the risk of injury.
Physical and Mental Rest
Adequate rest and recovery are vital to prevent overtraining and injury. Light activity, such as walking or gentle stretching, can help reduce muscle soreness. Engaging in active recovery exercises like swimming or yoga can also promote muscle repair and flexibility. Mental recovery is equally important, as the challenge can be emotionally taxing. Reflecting on the experience, celebrating achievements, and addressing any setbacks positively contribute to mental well-being.
Reflecting and Future Planning
Completing the Cuillin Round is a significant achievement that requires reflection. Evaluating the experience, recognizing areas for improvement, and celebrating successes are part of the journey. Many participants use this time to plan future challenges, whether it involves something completely different or perhaps taking on the even bigger link-up of the 70 tops of the Trans Cuillin, a west-to-east traverse from Glen Brittle to Broadford.
Conclusion
The Cuillin Round is more than just a mountain ultra running challenge; it is a test of endurance, skill, and resilience. It requires thorough preparation, both physically and mentally, and a deep respect for the unpredictable nature of the Scottish mountains of Isle of Skye. For those who undertake it, the Cuillin Round offers an unparalleled adventure that pushes personal boundaries and provides a profound connection to the rugged wilderness of the Isle of Skye. Completing this challenge is a testament to one’s determination, skill, and love for the mountains, leaving a lasting impression and a deep sense of accomplishment. It certainly did for me and on reflection, both The Cuillin Round and the Trans Cuillin offer ultra running experiences that are like no other.
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