Donald was born Feb. 11, 1930, in Elk Basin to Carl and Bessie (Estes) Hammontree.
He attended the University of Wyoming, receiving a bachelor of science degree in petroleum engineering.
From 1950-52, Donald served in the U.S. Air Force.
He married Fannie Sue (Durham) on Aug. 24, 1952, in Clovis, New Mexico.
During Donald’s 30-year career with Amoco, he lived in Wyoming, Colorado, Montana and a highlight was six years in Cairo, Egypt.
He enjoyed golfing, traveling and being a snowbird to Arizona. Favorite trips included taking a train to the East Coast and ALCAN Highway.
Donald was preceded in death by his parents and sister Frances Ann.
He is survived by his wife Sue; daughters Linda (John) Glines of Kearns, Utah, Karen (George) Holcombe and Cheryl Hammontree, all of Powell; six grandchildren and 11 great-grandchildren.
Graveside services will be held at 2 p.m. Friday, May 26, at Crown Hill Cemetery in Powell.
Memorial donations in Donald’s name can be made to the Powell Golf Club, P.O. Box 31, Powell WY, 82435; Spirit Mountain Hospice, 707 Sheridan Ave., Cody WY, 82414; or the charity of your choice.
Thompson Funeral Home is assisting the family with arrangements.