4.7
(12)
113
hikers
10
hikes
Hikes around Letterkeen are located within Wild Nephin National Park in County Mayo. The area is characterized by a mix of forestry tracks, open bogland, and mountain slopes that form part of the Nephin Beg mountain range. Trails often follow riverbanks and cross footbridges, with routes starting from the Letterkeen trailhead.
Last updated: June 27, 2026
5.0
(1)
13
hikers
4.61km
01:12
30m
30m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.0
(1)
5
hikers
4.28km
01:09
50m
50m
Easy 2.7-mile hike through Castle Archdale Country Park, offering woodland paths, Lough Erne views, and historical sites.

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4.5
(2)
28
hikers
3.69km
00:59
40m
40m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
13
hikers
12.0km
03:10
110m
110m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.8
(4)
8
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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A hive of activity, the marina at Castle Archdale is full of things to do. Why not park your bike and pedal on water on one of the hydrobikes? Kayaks, paddleboards and boats are also available to hire. Or if you're looking for a break, this is a great place to stop and take it all in.
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During WW2 Castle Archdale was a major base for flying boats and housed up to 2,500 people. Buildings such as these would have been a central location for the RAF fighters who lived here. Sometimes exhibitions are held in these courtyards to display some of the key historical notes of the use of this area during the war.
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A white beacon marks the location of Rossmore Point. There is a bench to sit on here where you can enjoy serene views over Lough Erne.
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Beautiful views over Lough Erne toward Tom's Island. Tom's Island is actually no longer an island, but once was before the lough was lowered.
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Old Castle Archdale is situated on Castle Hill within a 520 hectare coniferous and mixed broadleaved forest. The castle was built in the 1600s and was the main castle on this former estate before its successor took it's place in the 1800s, Castle Archdale.
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Take in the fabulous views of Lower Lough Erne from this point. Directly ahead you will see Crevinisaughy and Inishmakill island. These are one of the many islands found in this large lake system that is in fact widened sections of the River Erne as it flows towards the Alantic.
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Old Castle Archdale sits on a forest clifftop. It is named 'old' to distinguish it from its successor, the 18th century Castle Archdale. The castle was built by an Englishman from Suffolk who had been granted the estate in 1612 after paying 5 pounds, 6 shillings and 8 pence for the 1000 acres of land. During the Irish Rebellion of 1641 the castle was captured by Rory Maguire as part of the uprising to retake his lands that had been lost in 1607. The heir to the castle was saved by his nurse however the other children were killed. After the castle was returned to the family it was repaired and lived in until 1689. The castle saw its end during the Williamite Wars when the castle was burnt out and abandoned.
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All the main waymarked trails begin at the Letterkeen Trailhead, which is also the location of the Brogan Carroll Bothy. This rebuilt stone hut serves as the central starting point for adventures into the Wild Nephin National Park.
The terrain is quite varied and can be challenging. You should expect a mix of forestry tracks, open bogland which can be wet underfoot, and steep mountain slopes. Many routes follow riverbanks and cross footbridges. Sturdy, waterproof footwear is essential.
Yes, there are easier options suitable for families. The Castle Archdale loop is a relatively short and flat walk that can be completed in just over an hour, making it a good choice for an outing with children.
Dogs are generally permitted in Wild Nephin National Park, but they must be kept on a lead at all times to protect wildlife and livestock. Be aware that the terrain can be challenging for some dogs, with boggy sections and uneven ground.
The trailhead is located in a remote part of County Mayo. Access is via local roads that lead into the Wild Nephin National Park. Using a GPS with the destination set to 'Letterkeen Trailhead' is the most reliable way to navigate there. Be prepared for narrow country roads as you get closer.
Yes, there is a designated car park at the Letterkeen Trailhead. However, the area is a popular starting point for many hikes, so the car park can fill up, especially on weekends and during peak season. It's advisable to arrive early to secure a spot.
Given the remote location and changeable Irish weather, it's crucial to be well-prepared. Essential items include waterproof hiking boots, rain gear (jacket and trousers), extra layers of clothing, a map and compass (or a fully charged phone with offline maps), plenty of water, and snacks. The terrain is rugged, so proper footwear is a must.
Yes, Letterkeen is well-known for its waymarked loop walks. A great moderate option is the Old Castle Archdale Ruins – View of Tom's Island loop from Lisnarrick. It offers a satisfying circuit with varied scenery without being overly strenuous.
Wild camping is permitted within certain areas of Wild Nephin National Park, but there are strict 'Leave No Trace' principles to follow. You must camp at least 500 meters from any road or building. There are no formal campsite facilities at the trailhead, so you must be fully self-sufficient.
The area is highly regarded by the komoot community. Hikers often praise the spectacular views of the Nephin Beg mountains, the true sense of wilderness, and the well-maintained, color-coded trails that start from the bothy.
Yes, the trails in this area intersect with parts of two major long-distance routes. As you hike, you may find yourself on sections of the historic Bangor Trail and the Great Western Way, offering a chance to experience a piece of these famous Irish walks.
The landscape is the main attraction. Key features include the extensive pine forests on the mountain slopes, the rugged and open boglands, and the spuming Altaconey River. As you gain elevation, you'll be rewarded with stunning panoramic views of the Nephin Beg mountain range.


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