After graduating from college, Branch worked for The Gazette in Colorado Springs as a business reporter from 1996 to 1998, and a sports reporter from 1998 to 2002. He then worked as a sports columnist for The Fresno Bee from 2002 to 2005.
Branch wrote the book, The Last Cowboys: A Pioneer Family in the New West, which was released in 2018. The book centres on the Wright family from Utah, sixth generation ranchers who are also some of the world's best saddle bronc riders. The book came out of a 2015 New York Times article by Branch called The Ride of Their Lives.[7][8]
A collection of Branch's articles and personal essays is to be published in 2021 called Sidecountry: Tales of Death and Life from the Back Roads of Sports. This collection will include the 2013 Pulitzer Prize winning feature "Snow Fall: The Avalanche at Tunnel Creek,".[9]