The Pima County Public Library named Mythical River as a top pick for the 2016 Southwest Books of the Year. Reviewer Vicki Ann Duraine wrote:
Imagine a world in which a river’s conservation was as important as the community it supports. With the insight of a hydrologist and the heart of a poet, Sevigny champions this ideal in her lyrical and exhaustively-researched science journal cum memoir, interweaving the centuries-old paradigm of unlimited natural resources with the facts as she knows them: the Southwest is running out of water and rain does not follow the plow. … It is a call to arms: Mythical River may be the most important book you read all year.
Reviewer Bill Broyles said:
She’s balanced, funny, and perceptive… [and] brings a youthful exuberance to her alluring narrative.