Denver Post file
The 15th annual La Fiesta music/food/drink celebration returns to Boulder County Fairgrounds in Longmont on Sept. 10. 
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Saturday-Thursday. Organizers of the 15th annual La Fiesta at Boulder County Fairgrounds hope the multilingual event will foster understanding among immigrant and native-born communities, with diverse food trucks, drinks, live music and dancing. 7:30 p.m.-12:30 a.m. Sept. 10, 9595 Nelson Road in Longmont. $5-$25 via intercambio.org. Also next week: the fifth El Latir de México, a free concert that commemorates the 206th anniversary of the Independence of Mexico. The 7 p.m., Sept. 15 show at Boettcher Concert Hall features music and dancing from noted Mexican composers and artists. First-come, first-served tickets available at the Boettcher box office, 1000 14th St. More info: .
