Access forest at M05739 48822 A where there is a Coillte forest track which winds its way up the hillside. You can download a Coillte map of Derroura forest tracks on coillte.ie which is better than the OS map for this walk. Take a left at the top T-junction of tracks and head East to a rough forest cutting at M05664 47931 B. This short climb takes you up to the mountain bike trail from where you head roughly SSW across a boggy, heathery and rough terrain around the trees to the large summit cairn. You can shelter from any winds and/or rain at the top of the cairn in it's small hollow which I availed of to eat my sandwiches before heading down via the same route. Linkback: https://mountainviews.ie/summit/953/comment/5712/

The Coillte road from M05739 48822 A makes this a very accessible hill. I departed from it at M05664 47931 B, and headed up to the mountain bike path, across that and made directly for the cairn. I found the going on the hill proper a little awkward with deep beds of grass making it a bit of a slog. The Cairn is impressively large, with a depression on the NE side and on top. The historic maps name it as Carn Seefin, so I take it there's a Fionn MacCumhaill connection. I had a damp day but it made for dramatic scenery on Lackavrea and Knocknagussy.

Coming down, shortly after junction on the Coillte road at M05143 48212 C I made an unorthodox route down, following the small river. This section of the hill has an interesting geology with curious green tinted sandwiched stone in the river bed. I thought maybe it was marble but the green tint seems to be algae so I take it they are varying sandwiched schists. The river makes a bit of a ravine for itself and has a natural stone bridge it dives under and several small waterfalls. The largest of these at M056 482 D has a hidden opening tucked into its left as you face it, a small mine opening that is not marked on the OSI map. The drop that the river falls down continues SE east along the contour of the hill and there are several disused old copper/pyrite mines along it. Seemingly there are quite a few boreholes and test mines on the hillside.. There was once a tramway that brought the ore to Lough Corrib shore near where the river meets the lake, from where it was brought by steamer to Galway harbour for export in the 19th C. The mines were run by the Hodgson family who lived at Currevagh house. Linkback: https://mountainviews.ie/summit/953/comment/17970/

I did this summit as part of a 3 hour loop with Cappanalaurabaun. Unless there's a connecting route I'm unaware of I definitely wouldn't recommend it as You have to descend through some high tussocky grass while negotiating a lot of hidden groundwater, streams and fallen trees. There is an obvious fire break in the forest when you look west from Keeraunnageeragh and that's what tempted me onwards. It was by no means the worst traverse I've ever done but it was messy and definitely not for anyone with short legs! Linkback: https://mountainviews.ie/summit/953/comment/20878/

This walk starts out as a pleasant stroll through Derroura Wood from a forest entrance at M05739 48822 A. Follow the forrest track for about 1.5 kilometres then take the trail that veers off to the left at M05143 48212 C. After awhile you will encounter three mounds of gravel at M05664 47931 B, this is the indicator to take the short steep climb on the right that brings you up to the Derroura mountain bike trail. Here, the walk turns from Dr Jekyll to Mr Hyde. Cross the bike trail and hit up the waist deep tussocky grass for a gruelling 500 meter push to the large cairn at the summit. Be very careful as it's impossible to see where your feet are going. The inspiring views of Lough Corrib on the way back are hard to enjoy as you will be too busy picking your steps to safety. Linkback: https://mountainviews.ie/summit/953/comment/20103/