At one point the track divided into three and narrowed, and Allen climbed a tree to see where they were.
The track narrowed as it left the ford, becoming little more than a dusty trail through dense stands of pine and alder on either side.
By noon, the track narrowed to a tiny gap between great rock spines, and the wagon would go no further.
The track narrowed, a steep bank on one side that went down to the river below; dangerous if you missed your footing.
At the edge of the marsh, the track narrowed so that the cart's wheels crushed the grass on either side.
The ground rose, the track narrowed, the trees grew closer.
We lay up in the last of the cover, overlooking the point where the track narrowed and disappeared into the gloom of the ravine.
The track narrowed and new storms broke on them.
The track soon narrowed to a small wagon road, and after this to a footpath through the forest, which sloped upwards before us.
And another... The track narrowed, twisting deeper between the trees.