Dennis Dale Selsor, of Roundup, MT passed away peacefully at Roundup hospital on January 21st, 2026, at the age of 77. Dennis passed surrounded by friends after a brief hospital stay, having battled MS for decades. He was born June 26, 1948 in Beloit, Wisconsin to Dale & Emogene Selsor.
Dennis was an avid outdoorsman with many hobbies. Raised in Roscoe, IL, Dennis moved to Orange Beach, CA where he worked as a precision machinist. Upon retiring, he moved to Roundup, MT, in 2008.
Predeceased by his parents, aunt Eunice & uncle Roger Schewe & his best friend & cousin Robert Schewe.
Survivors include his sister Gloria McDonald (Roscoe IL), sons Dennis McMaster (Los Gatos, CA), David McMaster (Walworth, WI), nieces Lori (Rod) Singletary (Columbia, TN), Rhonda McDonald (Roscoe, IL), Denise Jones (Cumming, GA), grandchildren, great nephews & nieces, great great nephews, & dear friend Louis Vidic.
He will be remembered with love and fondness by many.
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