Castlemont High School All Classes Reunion Saturday, September 7 from 10am to 4pm at the Pleasanton Senior Center, 5353 Sunaol Blvd. Bring own food and beverages, no alcohol allowed. Entrance is $15. ea. or $10. ea for Castlemont Alumni Association members. For more information contact Greg Hickey 925-461-1381 or email@example.com.