The A746 is one of two main routes (along with the A747) down either side of the isolated Machars peninsula, eventually joining at Glasserton.
Braehead - Glasserton
The road begins to the west of the abandoned WW2 airfield of Baldoon at a triple-point, where the other roads are the A714 from Wigtown and the B7085 to the west coast. The latter was part of the former until the 1970s explaining why all three roads in this isolated spot have different numbers.
After passing through the rather nondescript villages of Braehead and Kirkinner, the road forks right - the 'straight on' route is taken by the B7004, a brilliant fast road down to the beautiful fishing village of Garlieston (this road was straightened out by Lord Garlies as a suitable approach to Galloway House - it's a fantastic at-the-limit B road blast!). Back to the A746, which now passes through a small forest. Care need to be taken here - there are some nasty kinks and I've seen deer on the road a couple of times. The B7052 from Whauphill now joins from the west, multiplexes for half a mile, then diverges west towards Garlieston in the village of Sorbie.
South of Sorbie, the A746 continues through some typical Machars scenery, rolling and fairly bleak but unlike any other part of Scotland. On the approach to Whithorn, two B roads join in quick succession; the B7021 from Myrton in the west, and the B7004 again from the east, which has looped round from Garlieston and now multiplexes with the A746 through town. Whithorn is famous as being one of the first Christian settlements in Scotland. The 'Whithorn Dig' centre displays local history and archaeology - well worth a visit if you're that way inclined. The town itself is basically a long wide street that probably used to be busy, but now always seems very quiet and empty. At the southern end of town the B7004 diverges left to the Isle of Whithorn (this was the former A750). The A746 continues along a pleasant tree-lined section before terminating at a T-junction. Turn right for the A747 to Port William and Glenluce; turn left for an unclassified road (declassified A747) which leads to the B7004 and the Isle of Whithorn.