The Hal K. Rothman Book Prize
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2018 Heading out : a history of American camping by Terence Young
2017 The city is more than human : an animal history of Seattle by Frederick Brown
2015 Power lines : Phoenix and the making of the modern southwest by Andrew Needham
2013 The nature of borders : salmon, boundaries, and bandits on the Salish Sea by Lissa K. Wadewitz
2012 Finding oil : the nature of petroleum geology, 1859-1920 by Brian Frehner
2011 Dreaming of sheep in Navajo Country by Marsha Weisiger
2009 The country in the city : the greening of the San Francisco Bay area by Richard A. Walker
2007 The battle over Hetch Hetchy : America's most controversial dam and the birth of modern environmentalism by Robert Righter