Biffle is a fan of fishing and enjoys deep sea fishing in Mexico, where he keeps a factory-sponsored Luhrs fishing boat. He formerly owned a pub in his hometown of Vancouver called "Biffle's Pub and Grill" located at 11500 NE 76th St. In 2010 Biffle announced that he had become part-owner of Willamette Speedway in Lebanon, Oregon along with Sunset Speedway in Banks, Oregon.[35] He is also a private pilot and owns a Cessna 210, along with a Dassault Falcon 50 with the tail number N116GB, a Dassault Falcon 10 with the tail number N316GB, and a Bell 206 with tail number N216GB.[36] Biffle owns a 2007 Ford GT and a 2007 Shelby Mustang GT500. The Shelby Mustang engine was rebuilt in 2013 and has 983 horsepower and 799 lb-ft of torque.[37]