Take Route 3 to exit 5 going west. Cross bridge over Route 3 if needed, go through lights, take 2nd right toward police station. Take a right onto Riverside Street and follow to Nashua South High School. Continue on Riverside to the final left into the parking lot. The softball fields are in the same direction that you were traveling when on Riverside; first will be the Nashua South upper and the Nashua South lower field is a fair walk beyond that.