Daniel Frank Miles passed away at the family home on the Lazy A M Ranch, on October 10, 2021, following a several year fight with aggressive prostate cancer. He was born in 1944 in Livingston to Arthur "Bud" and E. Lucille Miles, and graduated from Park High School in 1962. He went west to college at Oregon State University in Corvallis, where he met his wife, Rita. He studied computer science at OSU, which launched a four decade career in software development, first on mainframes and then pioneering applications for personal and desktop computing. He ended his computing career as a software architect designing and implementing medical information systems. In 2004, he and Rita moved back to Livingston to assist his parents in their final years, thus becoming the fourth generation to run the family lands in Park County. An avid skier and mountain biker, Dan loved the West. He skied in Oregon, California, Nevada and Montana; mountain biked in those states and more, and delighted in running on the beach with the family dogs, whoever they happened to be, all those years. He also had the great fortune to study for more than 20 years with several elderly Tibetan Buddhist lamas and other teachers in that lineage.He is survived by Rita, his wife of nearly 54 years, their daughter Lisa Miles Lin (Tim) and grandchildren Claire and Christopher, San Jose CA; son Carl Benjamin Miles (Kristi) and grandchildren Chiara and Atlas (A.W.), San Francisco, CA; sister Bonnie Harry (Dillon MT), and Lee Harry (Livingston); brother James Miles, Nashville, TN; numerous relatives, friends and neighbors including Terry Jane Dickinson, Ennis MT; Vicky Jo Kautenberger, Mead, WA; Cecil (Kathy) Carl, West Palm Beach. FL; Milo Miles, Chestnut Hill, MA; Kate Todd, Livingston, and Charles McClish, Livingston.He is also survived by his beloved border collie, Patsy, who, for the past decade, helped with cattle and who guarded him and protected him through a cardiac arrest and recovery in 2015. She has diligently supported him through his cancer fight while training her understudy, Dolly. He was devoted to both.At his request, there was no formal service. Cremation has taken place. Donations in his memory may be made to: RezQDogs, PO Box 8, Dodson, MT 59524, the group which found Patsy as a young puppy running alone on a reservation road; Vajrapani Institute, PO Box 2130, Boulder Creek, CA 95006, or the Prostate Cancer Foundation, 1250 Fourth St, Santa Monica, CA 90407.Franzen-Davis Funeral Home and Crematory has been entrusted with arrangements. To view the tribute page and share condolences, visit: www.franzen-davis.com.