The hike up Carn Mountain was enjoyable—even though it wasn’t the summit we planned to climb at the outset. The original idea was to go up Slieve Muck by the route suggested in Paddy Dillon’s 'The Mournes'; unfortunately the course was so waterlogged that it became more frustrating than it was worth. After some backtracking, we then moved toward Carn...
At the very beginning we started from the Banns Road and followed it to the Mourne Wall. After a short distance, the wall diverges in two directions – one heading up the steep side of Muck (this is the route Dillon suggests, and the one we eventually abandoned), the other toward Carn. The ascent to the mountain is moderate with one particularly steep, but short, section where the wall meets Miners Hole River. As usual, the wall is a perfect guide to the summit. As mentioned in a previous comment, the summit of Carn would be a good stepping stone to Muck (just follow the branch of the wall that goes west / south along the ridge).
On our descent from Carn, we followed the wall north toward Slieve Loughshannagh. Upon reaching the stile at Loughshannagh’s base, we took the track that heads down between Lough Shannagh and Doan. Though the OS map shows that the path nearly reaches the Bencrom River, we found it disappeared into the boggy flats around the Lough (however, it was quite wet the past week, so maybe the track is more evident when it’s dry?). We picked our way slowly through a boggy patch toward the cement shelter (where the Shannagh River meets the lough), and then eventually found a firmer track that merged with Banns Road. We took the road back to the small car park where we began.
The views on the route are great... the descent we took from Carn offered a good vista of Lough Shannagh, Binnian, and especially Doan. It may not be the most difficult hike in the Mournes, but satisfying due to the views and access it offers to other summits.
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