Mariann Anderson

Peterson

Mariann Anderson Peterson, 71, of Spanish Fork, Utah, passed away on November 10, 2026. She was diagnosed with Parkinson’s disease in 2017 that later turned into an additional diagnosis of Lewy Body Dementia earlier this year.

Mariann was born in Nephi, UT to Kent Spencer & Ruth Sperry Anderson. After birth, she was taken home and raised in Glendale, UT. She was the oldest of three children. Her siblings remember her as the most loving oldest sister, who doted on them until the end.

On November 19, 1976, she married the love of her life, Ross Peterson, in the Manti LDS Temple. For almost 50 years, they built a life centered on family, love, and service. Together, they brought three beautiful children into this world, Alisha, Spencer, and Curtis.

Mariann had a generous heart and found joy in serving others. She was a talented seamstress and loved to share her musical gifts as an organist, pianist, and singer. Above all, she treasured her family and the many relationships she built throughout her life. She will be remembered as a devoted wife, mother, sister, aunt, grandmother, friend to all, and the one who raised most of the children in the neighborhood.

She is survived by her husband, Ross; her children, Alisha Martinez (Adalberto) and Spencer Peterson (Inka); her grandchildren, Daniel, Jasmin, and Benji Martinez; Spencer and Liberty Peterson; her brother, Kent (Cindy) Anderson; her sister, Laurene Tait; In-laws: Jim (Marsha) Peterson; Jeff (Karla) Peterson; Boyd (Loni) Peterson; Suzanne Peterson; David Peterson and Scott (Karen) Peterson. She is also survived by her many nieces and nephews who love and will miss her dearly.

She was preceded in death by her son, Curtis J. Peterson; her parents, Kent and Ruth Anderson; her in-laws Lyman and Laura Peterson; her brothers-in-law, Ray Dean Peterson; Glendon Peterson and sister-in-law Ann Marie Peterson.

There will be a funeral service on Monday, November 16, 2026, at 11:00 at the Church of Jesus Christ of Ladder-day Saints located at 1486 East 130 North, Spanish Fork, UT. Visitation will be prior from 9:45 a.m. to 10:45 at the church. There will also be visitation on Sunday November 15, 2026, from 6:00 p.m. to 8:00 p.m. at the Walker Mortuary 187 S Main Street, Spanish Fork, UT. Interment will take place at Spanish Fork City Cemetery, 420 South 400 East, Spanish Fork, UT.