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.
Last updated: June 23, 2026
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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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I was lucky to see them at their best today, beautiful 😍
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Not a particularly high mountain but possibly the best 360 degree view in the Mournes!
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One of the very best mountains in the Mournes! Not a huge climb but incredible views in every direction!
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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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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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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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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