There is a rough track at G720410 A which winds its way up the East face of Copes Mtn. This almost takes you onto a rough boggy summit plateau where if you head roughly ENE to the' highest' part of the plateau a very low cairn has been 'erected'. Fine views are afforded of Glencar and its waterfall from this spot. An alternative route is from the sister summit of Crockauns G759409 B. Head W from the summit and pick up a fence which runs roughly NW across the alternatively heathery, boggy and tussocky terrain between the two summits. There are some small rises and fences to cross, but you will reach the small cairn in about an hour.
This summit, Crockauns West used to be labelled Copes Mountain, however this is lower and further west Linkback: https://mountainviews.ie/summit/612/comment/5371/

This picture takes in all that Copes has to offer , easy to access and a full days walk if you want. Linkback: https://mountainviews.ie/summit/612/comment/6332/

I climbed Cope's Mt on 5 May 2012 as the sixth and final hill in a round of the Castlegal Mountain Group.. (For previous part of the route see my comments on Crockauns). When we set out we had intened to finish our round on Crockauns but once there, with Cope's Mt beckoning to us some 1.7k to the W, we quickly decided to take it onboard. From the top of Crockauns we went down W across a wet peat hagged col to G753410 C before starting to climb up a trackless heather, peat hagged and hummocky slope in search of the top about 1k further along G7439041447 D. This involved tackling numerous heights and hollows on the way over what was the toughest terrain we had to tackle on the day. Make no mistake, while this is not a "mountain" in the true sense being only 452m, it would nonetheless be a serious place to get lost in bad visibility being an expansive sprawling trackless plateau surrounded by a steep escarpments of sheer cliffs on it's N and S rims. In such conditions very careful navigation would be essential. The flat heathery top of Cope's Mt. is undistinguised and the high point is unmarked. Indeed the OSi Sheet 16 names a lesser top Pt. 395 just over 1k further W as Cope's Mt.,which I understand, does have a summit cairn. From the top we headed generally SE, helped at times by fences leading in that general direction, to G7573640444 E from where we made our way down a steep grassy slope to the road below where a left turn and a short walk brought us back to the start point of our round G7626940300 F. In all our days walk covered six mv listed tops, Keelogyboy Mt., Keelogyboy Mt. SW Top, Keelogyboy Mt. NE Top, Hangman's Hill, Crockauns and Cope's Mt. and was 13.5k in length. A fine day out in an area frequently passed by on the way from Enniskillen to Sligo but not previously visited. Highly recommended but choose weather when good visability is expected and the scenery can be enjoyed.. Linkback: https://mountainviews.ie/summit/612/comment/6828/

Not much to add. Basically followed route outlined by paddyhillsbagger. Parked the car just off the road on the N16 at
G720410 A A on the map. There's a gap in the ditch, hop over the fence and head up the field where you meet the track. Follow the track for a few kilometres, climbing a few fences, and it eventually takes you up out onto the plateau, all the while having great views of Ben Bulben plateau, Kings Mountain, Truskmore and Glencar opposite as well as Sligo Bay, Sligo Town and Knocknarea behind you. There is nothing marking the actual summit point though there is a small semblance of a cairn a few hundred metres west of the summit. From there you can view to the west the nearby summit of Craughans and south west the various summits of Keelogyboy mountains Linkback: https://mountainviews.ie/summit/612/comment/22805/

Continuing west from Crockauns we descended into a rather wet and hagged saddle before gaining Copes's heathery slopes. Like most hills in the Dartrys, Cope's Mountain's most attractive features are not necessarily it's summit. Lacking a cairn or summit marker, it still has wide views, especially across Glencar and further, to Sligo Bay. Linkback: https://mountainviews.ie/summit/612/comment/4395/

The area around the summit of Copes Mountain looks like a battlefield, with 2 to 4m deep craters. The bog appears to be only 1 to 2m deep so these depressions must be holes in the underlying limestone.
Now wouldn't this make an interesting place for a night navigation exercise? Linkback: https://mountainviews.ie/summit/612/comment/4313/