Thanks for that. It was my ex Father in Law who waxed lyrical about the area, so when travelling up to tour Scotland last summer, we didn't do the usual of going up the A74 and all points North. We took a left turn at Gretna and headed up the A75 before turning off into the Galloway forest area, going up the A762 along Loch Ken and through St Johns. We eventually ended up on the coast at Culzean and made our way up to Ardrossan and the ferry. We never really intended to go that way but i'm glad we did and spent about a week in that area exploring. Will be back to explore some more of the Forest at some point. I see from your link that the Cairnsmore is Granite and we both like geology, so something else to look out for.