Mack Pena Jr. was born in Ogden, Utah to Mack Pena Sr. and Josephine Lopez Pena on December 24, 1950

Mack died June 23, 2007 in Evanston Wyoming. He was living in Mountain View Wyoming at the time of his death. He is buried in Fort Bridger Cemetery, Fort Bridger, Wyoming

Mack was raised in Sunset and graduated from Clearfield High School, Utah in 1969

Mack Served in the United States Air Force