Esme is a Jack Russell/Chihuahua cross brought over from a Greek rescue home by dog lover Jo Graves, 59, who spotted her online.
Jo said that she let Esme out into the garden of her home in Clewer Avenue, when a firework frightened her so much that she pushed her way out of the chicken wire designed to keep her safe and ran for it.
For three days Jo, her three sons and her neighbours tried to find her.
Jo said: “She was spotted in Hermitage Lane. A van driver saw her run into Windsor Great Park.
“She ran across Sheet Street and was clipped by a car. The man tried to catch her but she got away.”
Esme ended up deep in Windsor Great Park Village where kind park wardens who spotted her helped by leaving food and bedding out for her.
Jo said: “We realised that as a rescue dog she probably thought she was being hunted and we must stop looking.
“I was frantic, then at 10pm three days after she ran off a neighbour rang my doorbell. She had seen Esme heading up the road towards the house, followed her discreetly and made sure I was alerted.”
Esme is safe at home now after her adventure – enjoying her favourite meals of cheese and sausages.