Calendar of Events Loading view. Programs Venues Hahamongna Watershed Park 4550 Oak Grove Dr Pasadena, CA 91103 United States Get Directions Today 06/03/2023 Saturday, June 3, 2023 - 05/06/2024 Now Select date. June 2023 Painting the Arroyo: Switzers Falls and Hahamongna Saturday, June 3, 2023 at 8:00 am - 3:00 pm Previous Programs Today Next Programs Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file