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Castlewellan

The 11 Most Amazing Peaks around Castlewellan

Best mountain peaks around Castlewellan are found in a region characterized by rolling hills and woodlands, serving as a base for exploring the Mourne Mountains. Castlewellan offers direct access to local hills and is framed by the majestic Mourne Mountains. This area provides diverse terrain for outdoor activities, ranging from accessible walks to challenging mountain climbs. The landscape features prominent hills within Castlewellan Forest Park and larger peaks a short distance away.

Best mountain peaks around Castlewellan

  • The most popular mountain peaks is Summit of Slieve Donard, a natural monument that is Northern Ireland’s highest peak, rising directly from the shore of the Irish Sea. The summit offers views that can extend to the Isle of Man, Anglesey, and the West Coast of Scotland.
  • Another must-see spot is The Mourne Wall, a man-made monument that runs across the principal summits of the Mourne Mountains. This 31 km wall passes over more than 15 peaks and was built to keep livestock from contaminating the Silent Valley Reservoir.
  • Visitors also love Slieve Bearnagh, a viewpoint known for its two giant rocky tors and the col between them. It is the fourth highest peak in the Mourne range, standing over 700 meters.
  • Castlewellan is known for prominent hills, challenging summits, and accessible viewpoints. The area offers a variety of mountain peaks to see and explore, from local hills like Slievenaslat to the higher Mourne Mountains.
  • The mountain peaks around Castlewellan are appreciated by the komoot community, with 39 upvotes and 23 photos shared by visitors.

Last updated: June 23, 2026

Slieve Commedagh Summit

Highlight • Summit

Slieve Commedagh, at 767 meters, is the second-highest peak in the Mourne Mountains and a rewarding climb for any hiker. Its summit offers sweeping views across the Mournes and out to the Irish Sea, a reminder of how close these mountains sit to the coast. The ascent is steep and demanding, often over pathless ground, but never overly technical in good weather. You can climb it on its own or link it with nearby peaks such as Slieve Donard, making for a truly memorable day in the heart of the Mournes.

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Slieve Bearnagh

Highlight • Viewpoint

Slieve Bearnagh from the Irish “Sliabh Bearna” meaning “Gapped Mountain” gets its name from its two giant rocky tors and the col lying between them. It is the 4th highest in the range and another 700m+ peak carrying the Mourne Wall with saddles at Pollaphuca to the West and Hares Gap to the East.

It is most accessible starting from the Cecil Newman Car Park and following the Trassey Track up and over Hares Gap, turning right and climbing the steps to meet the Mourne Wall which you follow to both summits. The final climb is steep requiring some hands and knees type scrambling. If doing a circular route descending from the North Tor (680m / J315282) to Pollaphuca is also extremely steep so care is required.

(mourne-mountains.com/mournes/mountains/slieve-bearnagh/)

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Slieve Croob Summit

Highlight • Viewpoint

Slieve Croob stands at 534m and is the highest peak of the Dromara Hills, situated just north of the Mourne Mountains. From the summit, you can enjoy expansive views across County Down and toward the Mourne mountain range, a designated Area of Natural Beauty.

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Summit of Slieve Donard

Highlight • Natural Monument

Northern Ireland’s highest peak and the pinnacle of the Mourne Mountains, Slieve Donard rises directly from the shore of the Irish Sea. The 19-mile (31 km) Mourne Wall joins a stone tower and the remains of two burial cairns on the summit, from where the Isle of Man, Anglesey, and the West Coast of Scotland can be seen.

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Slieve Doan

Highlight • Climb

Slieve Doan is an impressive peak that sits amongst some of the highest mountains in Northern Ireland. It reaches a height of 562m and provides breathtaking 360-degree views across the Mournes from all directions, a fabulous introduction to this mountain range.

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Tips from the Community

Damiano 🇮🇹
August 19, 2025, Slieve Commedagh Summit

Slieve Commedagh, at 767 meters, is the second-highest peak in the Mourne Mountains and a rewarding climb for any hiker. Its summit offers sweeping views across the Mournes and out to the Irish Sea, a reminder of how close these mountains sit to the coast. The ascent is steep and demanding, often over pathless ground, but never overly technical in good weather. You can climb it on its own or link it with nearby peaks such as Slieve Donard, making for a truly memorable day in the heart of the Mournes.

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bring lunch as there was no pub grub at the top

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TrevorM
November 27, 2024, Slieve Donard Summit

I was lucky to see them at their best today, beautiful 😍

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StevieT
February 28, 2024, Slieve Doan

Not a particularly high mountain but possibly the best 360 degree view in the Mournes!

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StevieT
December 15, 2023, Slieve Doan

One of the very best mountains in the Mournes! Not a huge climb but incredible views in every direction!

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StevieT
November 24, 2023, Slieve Doan

One of the best viewpoints in the Mournes! Instagram-worthy whichever direction you look!

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Congratulations, you've made it up the mighty Slieve Donard. Being the highest of the Mourne Mountain peaks, this is an incredible achievement. Take a well-earned rest and enjoy the phenomenal views across the stunning Mournes and out to the Irish Sea.

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Grace Mulligan
October 20, 2023, Slieve Doan

Well done! You just reached Slieve Doan, a 562m peak that sits amongst some of the highest in the Mourne Mountain range. Take a seat and a breather, and enjoy 360 panoramic views across the Mournes from all directions.

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Frequently Asked Questions

What are the most popular mountain peaks to explore near Castlewellan?

The region around Castlewellan offers a variety of popular peaks. Northern Ireland’s highest peak, Summit of Slieve Donard, is a must-visit for its panoramic views. Another highly regarded peak is Slieve Bearnagh, known for its distinctive rocky tors and challenging climb. For those seeking a rewarding climb within Castlewellan Forest Park, Slievenaslat offers excellent views of the lake and the Mournes.

Are there family-friendly mountain walks around Castlewellan?

Yes, Bunkers Hill, located at the edge of Castlewellan town, is ideal for families. It features a short circular trail suitable for walking and cycling, offering views of Dundrum Bay and the Mourne Mountains. It also boasts a natural play trail for children aged 4 to 11, with basket swings, a lookout tower, and a climbing wall, making it a fun and engaging option for all ages.

What natural features can I expect to see on mountain peaks near Castlewellan?

You'll encounter diverse natural features. Slievenaslat in Castlewellan Forest Park offers luscious woodlands, a serene mountain lake near its summit, and panoramic views. The Mourne Mountains, including peaks like Slieve Donard and Slieve Bearnagh, are characterized by rugged granite tors, dramatic cols, and expansive vistas that can stretch to the Isle of Man on clear days.

Are there any historical landmarks on the mountain peaks in the area?

Yes, the region is rich in history. The summit of Slieve Donard features a stone tower and the remains of two ancient burial cairns. The Mourne Wall itself is a significant man-made monument, traversing 15 peaks and built to protect the Silent Valley Reservoir. Additionally, Slieve Meelmore has a summit shelter and evidence of old stonemasons' huts, suggesting its role in the wall's construction.

What outdoor activities can I do near these mountain peaks?

Beyond hiking and climbing the peaks themselves, the area around Castlewellan offers a range of outdoor activities. You can find numerous hiking trails, from easy lakeside walks to moderate loops like the Slievenaslat Peak & Castlewellan Castle loop. For cyclists, there are road cycling routes, including challenging climbs, and gravel biking options like the Castlewellan Lake loop.

What is the difficulty level of Slievenaslat in Castlewellan Forest Park?

Slievenaslat, while not a high mountain at 272 meters, offers a steep and strenuous climb. The trail features uneven terrain with loose stone gravel and tree roots, making it a challenging walk. Good walking shoes are recommended for this ascent within Castlewellan Forest Park.

Where can I find expansive viewpoints of the Mourne Mountains near Castlewellan?

Many peaks offer stunning views. Slievenaslat provides panoramic views of the Mourne Mountains from its summit. Bunkers Hill offers glorious views of the broader Mourne Mountains, along with Dundrum Bay and Slieve Croob. For the most expansive vistas, the summit of Slieve Donard provides views that can extend to the Isle of Man and Scotland on clear days.

Are there any easy mountain walks suitable for beginners near Castlewellan?

For beginners or those seeking less strenuous options, Bunkers Hill offers an accessible, short circular trail with rewarding views. Within Castlewellan Forest Park, while Slievenaslat is strenuous, there are also easier walks like the Lakeside Walk that offer views of the surrounding hills without significant elevation gain.

What is the significance of <a href="https://www.komoot.com/highlight/3835021" target="_blank" rel="noopener">The Mourne Wall</a>?

The Mourne Wall is a 31 km (19-mile) man-made monument that runs across the principal summits of the Mourne Mountains, passing over more than 15 peaks. It was built over nearly 20 years to prevent livestock from contaminating the Silent Valley Reservoir. It's a popular route for hikers, forming the basis of the challenging Mourne Wall Challenge.

What makes <a href="https://www.komoot.com/highlight/1279695" target="_blank" rel="noopener">Slieve Croob</a> a notable peak?

Slieve Croob, standing at 534 meters, is the highest peak in the Dromara Hills, just north of the Mourne Mountains. Its summit offers expansive views across County Down and towards the Mourne range. It's also notable for being the site of a large ancient burial tomb, said to be the resting place of 12 kings.

What should I know about parking and access for mountain trails near Castlewellan?

Castlewellan Forest Park, which includes Slievenaslat, has designated parking facilities. For the wider Mourne Mountains, various car parks serve different trailheads, such as Cecil Newman Car Park for accessing Slieve Bearnagh. It's advisable to check specific access points for your chosen trail. For more information on Castlewellan Forest Park, you can visit visitmournegullionstrangford.com.

What do visitors enjoy most about the mountain peaks around Castlewellan?

Visitors consistently praise the breathtaking scenery and diverse hiking experiences. The challenging climbs, like those to Slieve Donard and Slieve Bearnagh, are highly rewarding, offering spectacular views. The unique presence of The Mourne Wall adds a distinctive character to many hikes, making the area feel magical and a hidden gem for outdoor enthusiasts.

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