Mrs. Gehret retired in 1998.
The longtime Ruxton resident, who moved to Sparks in 2000, was a member of the Smith College Club of Baltimore, where she had served as co-chairman and treasurer for many years of the organization's annual book sale, which provides scholarship aid for young women attending the Northampton, Mass., college.
An accomplished seamstress and costume designer, Mrs. Gehret worked for years with John Lehmeyer, who had been the Baltimore Opera Company's production director and costume designer, and who also directed and designed productions at the Peabody Conservatory and the Washington Summer Opera.
She was also a skilled knitter who enjoyed knitting hundreds of sweaters for family members and friends.
"Newborns were always greeted with a new sweater from Judy," said a daughter, Carolyn A. Gehret of Sparks.
Mrs. Gehret enjoyed completing crosswords, double-crostic, jigsaw and logic puzzles, and when recuperating from a fall, would study a puzzle, and then dictate the answers to visitors who had a pencil or pen, family members said.
An avid reader, she was a fan of the mystery novels of Rex Stout and Sue Grafton, and also enjoyed family vacations at Bethany Beach, Del.
Services were private.
Also surviving are a son, Robert S. Gehret of Hampstead; another daughter, Catherine E. McCaslin of Seattle; seven grandchildren; and four great-grandchildren.
Another daughter, Elizabeth G. Starling, died in 2000.
