The B8072 is one of the roads on the Isle of Coll. It was originally unclassified but gained its number in 1930, at the same time as the other roads. It starts on the B8071 and runs north east along the island's northern coast.
From the unmarked junction at Arnabost, the B8072 heads northwards, past Gallanach and on towards the shore. The landscape is a variety of rocky outcrops, sand dunes and a few fields, dotted with occasional houses. The road initially climbs steadily, with one steeper section, up to a summit of nearly 50m, making it the highest road on the island. After passing the small rocky hill of A'Chròic, old maps suggest that the road once ran closer to the shore, before curving back inland to cross the stream. However, this areas is all sand dunes and any evidence on the ground appears to have been buried. The current road line appears to deviate from that shown on old maps in may places, but this is one of the places where it seems less likely to be a mapping error.
The tiny settlements of Cornaigbeg and Cornaigmore are quickly passed, and between the two of them is a 50-metre segment with two lanes - one might call it a dual carriageway although it is a rather fanciful description and the two lanes are not properly parallel. Then the road heads eastwards, a little further inland than it has been, and there is another possible realignment near the head of Cornaig Bay. Here, at least, there is some evidence in the landscape for the old road forking left through a gate. Being further inland, the landscape is largely rocky moorland, with the road winding round outcrops and through natural cuttings. Eventually this slow road comes to an end at a turning head above the coastal settlement of Sorrisdale, clustered around Sorrisdale Bay at the east end of the island.
Apart from the tiny two-lane section, the road is entirely single track with a scattering of passing places, and grass growing along the middle of the road most of the way. Streetview from late 2021 shows the road to be in very poor condition with a broken and pot holed surface.
