He was born on March 7, 1933 in Redfield to Cecil and Ruth (Miller) Thomas.

Dallas grew up on the farm at Zell, SD, graduating from Redfield High School. After serving in the US Navy during the Korean War and honorably discharged in, he earned his engineering technician degree from Brown University.

Dallas moved to Rapid City in 1977 and retired from the City of Rapid as Sr. Engineering Technician. During his time with the City of Rapid, Dallas was instrumental in designing the Bike Path through Rapid City.

He married Mary Curry in Rapid City on August 30, 1980.

Dallas and Mary enjoyed riding their motorcycle and spent many hours throughout the Black Hills as well as on their snowmobile. He was an avid woodworker and enjoyed fishing and hunting.

Dallas is survived by his wife, Mary, Black Hawk, his brothers, Norm (Romy) Thomas, Black Hawk, Steve Thomas, Aberdeen and Wallace Thomas, Blytheville, AR. His children; Mike (Misty) Arnio, Kirby, MT, Mitch (DeAnna) Kammerer, Wall, Michele (Johnny) McGriff, Quinn, SD, David Thomas, Sandra (John) Schmidt, Cindy (Russ) McMahon, Katherine Christiansen, and Dede Thomas, all of MN and 16 grandchildren, 15 great grandchildren.

He was preceded in death by his parents and his son, Brad.

Graveside Memorial services will be held at 2:00pm on Monday, October 29, 2018 at Pine Lawn Memorial Park with military honors.

A memorial has been established by the family.

Osheim & Schmidt Funeral Home is hosting his online guestbook at www.osheimschmidt.com.