Time Out says
AmericaFest at the Rose Bowl is an explosive celebration of all things red, white and blue—and easily the biggest show in L.A. The fireworks typically don’t shoot off until 9pm, but the Rose Bowl opens its gates hours earlier on Independence Day, usually starting with kid-friendly carnival fun, followed by an in-stadium program that includes motocross stunts and a tribute to JPL. Parking for the event will cost a whopping $45, but you can make it worth your while with an afternoon of tailgaiting outside the stadium. If you don’t want to venture into the stadium, the show is viewable from the areas around the Arroyo, most easily accessible along the Colorado Street Bridge and the neighborhoods west of the 210, and, distantly, from parking garage rooftops in Old Pasadena.