Mark was born on October 4, 1946, at the Atascadero hospital as there was no hospital in Paso Robles at the time. He was the oldest of three children born to Armand and Mary E. Mastagni. Raised in Paso Robles, he attended local schools and graduated from PRHS in 1964, a proud Bearcat! In high school he met Darlene Sands, the love of his life and they later married at the First Baptist Church in Paso Robles.
After high school Mark attended Cuesta College until he joined the Air Force. After serving 4 years in the Air Force, Mark worked for the Department of Defense at Camp Roberts for over 30 years.
Growing up Mark spent a lot of time at the family dairy ranch where 80 cows were milked twice a day365 day a year. You can still see the silo standing tall along Hwy 101.
In his adult years he raised cattle and was active in cattle associations. Over the years he bought several replacement heifers at the Mid-State Fair and was a supporter of local youth.
Darlene passed away in 2002, after a short illness. Mark is survived by his son Dennis and his two children, Cheyanne and Armand, two sisters and many nieces and nephews and cousins.
Please join us for a celebration of Mark's life on Thursday November 19, 2026, at 11 am at the Paso Robles district cemetery. Followed by a gathering at "the Backyard" in downtown Paso Robles.
