Mark Tracy Muller, 68, of Greeley, Colorado, passed away on February 7, 2026, at Fairacres Manor. He was born May 27, 1957, in Denver, Colorado to Richard and Bernice (Downey) Muller.

Mark was born in Denver but grew up in Greeley, Colorado. He attended Greeley West High School, and while attending he participated in wrestling and gymnastics. He was a very athletic individual. After graduating from high school Mark set out on his life adventure. He received a scholarship to attend Willam Jewell College in Kansas City, Missouri. While there he went to Officer Candidate School where he joined the military and then received an honorable discharge after serving. He then went and studied at Aims and UNC. Along with the colleges here in the United States Mark also attended college in England and then Oxford. Mark was able to travel to parts of the world some of us dream about.

Mark then found his calling as a chiropractor, he then went to Life Chiropractic in Atalanta, Georgia graduated in 1982. Then went to Pheonix in 1984 and worked in Kingman, Arizona where he stared Muller Chiropractic Center in 1987. Mark helped people until he moved back to Greeley in 2018 to be with family and enjoy the life he had built.

Mark loved to fish and was a part time golfer. But his true passion was raising and breading dogs. He was a dog breeder for German Short Hair Pointers and Doberman Pinchers. Having this as his hobby just solidified his passion and love for animals.

Mark survived by his mother, Bernice; brothers, Charles and Michael (Pam) Muller; sister, Roma (Rick)Weinkauf; and extended family.

He was proceeded in death by his father, Richard Muller

A Celebration of Life Service will be held at 2:00 p.m., Friday, February 20, 2026, at Adamson Life Celebration Home 200 47th Ave, Greeley, CO. A reception will be announced.

In lieu of flowers please make a donation to American Cancer Society or Diabetic Research in Mark’s name.