Monsoon Festival & Boating Poker Run Lake Havasu City Arizona. 2 Days of Live Music Concerts September 18th & 19th, 2020. Live Music and Entertainment for the Whole Family. Freestyle Motocross Shows, Monster Truck Rides, Boat Poker Runs, Boat Show, Vendors, Food & Beverages. Click the Poster Below for Up to Date Monsoon Music Festival Information