(WSB video, photos)The Aztec dancers of Tlalokan were the first performers at this afternoon’s Duwamish River Festival in South Park:This year’s festival is happening in collaboration with the South Park Summer Party (SOPASUPA) for the first time; festival events are centered at Duwamish River People’s Park (8700 Dallas Ave. S.). In the first hour, the main stage also held emcees from the Duwamish River Youth Corps, festival-presenting Duwamish River Community Coalition leader Paulina López …… Also, Duwamish Tribe representative Kristina Pearson …… and two city councilmembers – citywide Councilmember Dionne Foster …… and District 1 Councilmember Rob Saka. At South Park’s main intersection a block south of there, 14th Avenue S. and S. Cloverdale, you’ll find the main SOPASUPA stage behind the businesses on the southwest corner (The Scene, Uncle Eddie’s, Loretta’s). Lucha Libre Volcanica (with Mexican-style masked wrestling) is about to get going there, and we have much more coverage to add! There are street closures east of 14th Ave. S. because of the festival – but there are lots where you can park and take a free shuttle – they’re listed between the maps here.