timberline
nounUS /ˈtɪmbɚˌlaɪn/
Etymology From timber + line.
1
The height or limit beyond which trees do not grow in mountainous or Arctic regions.
- Most flocks in the Sierra and the Rocky Mountains live above the timber-line and at an altitude of twelve thousand feet.1915 April 23, Enos A. Mills, “Wild Mountain Sheep”, in The Rocky Mountain Wonderland, Houghton Mifflin, →LCCN, →OCLC, page 37:
- Derived terms
- timberline sagebrush, timberline sparrow