1 adjectives to describe trackway

The forerunners pushed on in front to give notice of the king's arrival, and in the dim morning light the motley train of riders at last crowded along the narrow trackway, followed heavily by the waggons dragged by single file of horses, which too often foundered in the muddy hollows, or half-plunged into the torrents through rents and chasms in the low, narrow bridges that threatened at every instant to crumble away under the strain.

1 adjectives to describe  trackway