Mountain Interval is a 1916 poetry collection written by American poet Robert Frost.

Published by Henry Holt, it is Frost's third poetic volume.

The book was republished in 1920, and after making several alterations in the sequencing of the collection, Frost released a new edition in 1924.

[citation needed] Five lyrics of the earlier collection were compiled next under the title "The Hill Wife".

This article about a collection of written poetry is a stub.