This article is about the Class III road numbered C27 maintained by Angus Council. For other roads numbered C27, see C27.
The C27 starts on the B955 on the edge of Kirriemuir and heads north, crossing the shoulder of Castle Hill. It dips down to cross the Quharity Burn, before climbing again and crossing the C25. As it continues north, it winds its way into Glen Prosen, staying some way up the hillside at first, but slowly losing height as it heads up stream. After crossing the mouth of Glen Uig at Lednathie, the road climbs steeply over the nose of Broom Hill., before dropping down to the river bank. The bridge at Spott links to the C28, but the C27 stays on the south side of the river as the glen turns northwest, and then in the last half mile a bridge carries the road over to Glen Prosen Lodge, the public road coming to an end soon after.
The C27 heading north-westwards before dropping down into Glen Prosen. The blunt cone of Mayer in the distance stands at the head of the glen.