Question: free things to do inland empire?
Answer: CONCERTS.
Lake Arrowhead Village Concert Series. Music Friday and Saturday evenings through Labor Day, with bonus concerts on July 4th weekend. ... 
Rock Yard. ... 
Temecula Summer Concerts. ... 
Canyon Crest Towne Centre. ... 
Fontana Summer Concerts. ... 
Norco Summer Concerts in the Park. ... 
Chino Hills Concerts in the Park.