The Ravinia Festival is the oldest outdoor music festival in the United States , with a series of outdoor concerts and performances held every summer from June to September .

In Ravinia Park 's first summer of 1905 , it hosted the New York Philharmonic , and the prairie style Martin Theater dates from this time period .

Located Placing in Highland Park , Illinois , the festival operates Being_in_operation on the grounds of the 36 acre ( 150,000 m² ) Ravinia Park , with a variety of outdoor and indoor performing arts facilities .

The Ravinia neighborhood , once an incorporated village before annexation in 1899 , is known as Ravinia , and retained Preserving its own post office until autumn 2010 .

The Ravinia neighborhood , once an incorporated village before annexation in 1899 , is known as Ravinia , and retained Preserving its own post office until autumn 2010 .

The business district on Roger Williams Ave. , within walking distance from the Ravinia Festival grounds , includes Cause_to_be_included neighborhood service businesses and restaurants .

Ravinia takes Getting its name from the ravines found nearby along the shoreline of Lake Michigan .