the zone, at high altitudes or high latitudes, beyond which no trees grow. Trees growing between the timberline and the tree line are typically stunted
tree line in American English
US
timberline
Examples of 'tree line' in a sentence
tree line
You start at the kitchen shack and go back from there, the whole second camping area and the grounds as far as the tree line.
Kallen, Lucille C B GREENFIELD - A LITTLE MADNESS (2002)
The captain studied the tree line for a while then stood in his stirrups to look over the surrounding countryside.