Sick Heart River (1941) is a novel by Scottish author John Buchan set in Canada. It was published posthumously. The book was published in the United States under the title Mountain Meadow.
The plot is particularly poignant, since it discusses a terminally ill man, Edward Leithen, going off to die in a hidden valley in the Canadian wilderness. Buchan wrote this while Governor General of Canada and it was published posthumously following his death as a result of a fall and stroke.