[RWD version 1 ] Despite it's modest 405m height, Croaghacullin is not the easiest hill to climb, or indeed to find. There may be other routes available, but this hill is heavily skirted by forestry and the trick was to find the chink in the armour.Beyond Killybegs (on it's western side) I took the right turn at the roundabout, signed 'L1265 Local Access'. After a few kilometres I turned left at a T-junction G71850 78614. The road ascends onto moorland, with some rough surfacing en route. Lough Aroshin is passed on the left, and I parked in front of a barrier that terminates the road for the public.Climbing over the barrier I walked up the road for a few minutes, ignoring a track off to the left (the western side of the hill is heavily forested with some nightmarish terrain). At about G69810 81426 I headed left uphill, where there's a break in the trees. It's steep and there are a couple of low crags and gullys, but I was soon at the top of a minor northern summit.
Croaghacullins main summit lay about 600m south. It was easy going down to a shallow saddle, and the climb to the unmarked top was undemanding. There are good views, and what looks like the potential of a longer route to include Crownarad to the southwest.
Time wasn't on my side, so I returned by my ascent route.