Gabbro is one of the roughest and most frictiony rocks around and is superb for scrambling on, as all visitors to the Skye Cuiilin across the water know. I never realised until yesterday that Slieve Foye was made of it, or I'd have paid it a visit years ago. My loss, as the ridge traverse is a superb half day, with myriads of lovely rough rock tors to clamber around on. I started from the high road on the SW, about 300m north of the school (space for about 3 cars). The Tain Way is signed up to the ridge, then follow the latter over the main summit and numerous minor ones (more than the map shows) to Eagles Rock, taking in as much rock as you fancy. Bear left to Ravens Rock then head south to pick up a good track leading out to the road about a mile from your car. Linkback: https://mountainviews.ie/summit/298/comment/19686/