To many, Dalton personifies St. Mary's School.
Karlene Gonyeau, a St. Mary's graduate who is now the school's assistant principal, said Dalton is the key to everything at the school.
"We've been blessed to have Sister Sharon at St. Mary's," she said. "She's responsible for all our success."
Dalton is more than just a principal. She's active in the parish, visits the sick and lives a spiritual life.
"It can be difficult to balance everything," she said. "Corporal and spiritual works of mercy are the very foundation of our faith. I have to be certain to find time for prayer. My days are full."
Dalton is a bit uneasy with the attention accompanying the anniversary.
"I really didn't want any big deal," she said of the Mass and reception. "But I think it's good that we celebrate our vocations. We'd like to attract more young women to join us, so we need to show them what a great life it it."
Dalton has seen the future - and it looks a lot like the present.
"I hope the spend the next 10 years right here," she said. "I'm heading for my 50th anniversary."