Mrs. Walston was born Patricia Van de Visser in Easton and was raised in Preston on the Eastern Shore. She graduated from Preston High School in 1960.
She received a scholarship to Hood College in Frederick, where she earned her bachelor's degree in early childhood education.
She married W. Carlton Walston, a childhood friend, in 1964.
She taught for several years at Atholton Elementary School in Howard County and at Middle Patuxent Nursery School in Clarksville. She left teaching in 1969 to raise her children in Highland, where she was a member of the Parent Teacher Association of Clarksville Elementary School.
In the early 1980s, she began a 16-year career in real estate, covering Howard and Montgomery counties for what is now Weichert Realtors.
She retired in 1997 with her husband to Florida, where she enjoyed gardening, socializing with friends and traveling. The couple made several trips to Hawaii and went to Italy last fall.
Mrs. Walston was a member of Mount Zion United Methodist Church in Highland and a member of its United Methodist Women group.
A memorial service will be held at 11 a.m. Saturday in Jupiter.
In addition to her husband, she is survived by a daughter, Jennifer Smith of Ellicott City; a son, Drew L. Walston of Jessup; a sister, Sharon Lee of Preston; her father, Peter Van de Visser of Easton; a brother, Robert Van de Visser of Denton; and three grandaughters. A son, Christopher C. Walston, predeceased her.