Its very easy- from the M6 take the A75 for Stranraer, take the second turn off for Annan, then first right and follow signs for Comlongon Castle until you get to Clarencefield, it should take about 20 mins from the M6.

From Dumfries take the A75 to Carlisle and turn right onto the B724 about two miles outside the town and keep going for about 5 miles.

Dumfries and Galloway Visitors Guide

Dumfries and Galloway Online