Avalon Walnut Ridge, located in the heart of the East Bay at Contra Costa Centre is steps from the Pleasant Hill/Contra Costa Centre BART Station. Avalon Walnut Ridge, located in the heart of the East Bay at Contra Costa Centre is steps from the Pleasant Hill/Contra Costa Centre BART Station. These apartments come in studios, one and two bedroom designs that feature modern kitchens with all appliances including a washer and dryer in each home, spacious walk-in closets and beautiful views of the courtyard or Mount Diablo. Upgrade any home to Furnished+ and enjoy the convenience of turnkey living. Luxury amenities include outdoor pools and spas, two state-of-the art-fitness centers, Fitness On Demand programming, courtyards with lush landscaping, and barbecue grills with seating areas.