Mark Alan Miller, 66, of Longmont, passed away April 2, 2017 at Boulder Community Health Foothills. He was born September 22, 1950, in Longmont, Colorado to Albert and Marian (Huelskemper) Miller.Mark was a graduate of Longmont High School and attended CU. He married Lorene Cushman in 2006. Mark was a Real Estate agent and property appraiser. He worked for Larson Reality in Boulder. He was active in volunteer work in the Boulder area. He also enjoyed hiking, camping, and was an avid rafter and rafting guide.He was preceded in death by his parents. Mark is survived by his wife Lorene, two sisters Gretchen Hofer and Trudy Richman.A Celebration of Life service will be held at 1:00 PM, Saturday April 22, 2017 at the D-Barn in Longmont. Cremation entrusted to Ahlberg Funeral Chapel and Crematory. Contributions can be made to the charity of your choice. Share condolences at www.ahlbergfuneralchapel.com.