Puerto Vallarta's street food tradition predates the resort town itself by three centuries. Long before the Malecón drew international travelers, the cobblestoned blocks of Old Town served as trading posts where coastal fishermen met sierra mountain farmers, and their exchange produced a regional cuisine distinct from Guadalajara's or Mexico City's: pescado zarandeado grilled over mesquite, tacos de camarón folded with still-warm tortillas pressed from Jalisco maíz criollo, and birria stewed in clay pots unchanged since colonial rule. The street vendors who line Calle Morelos and cluster near the parish church of Our Lady of Guadalupe operate on multi-generational recipes, many passed orally rather than written, with exact spice ratios and marinade timing known only within families. Today, a street food tour Puerto Vallarta brings visitors into contact with this living culinary archive. The city's compact historic center concentrates more than sixty food stalls within a twelve-block radius, each specializing in a narrow repertoire perfected over decades. One cart has sold only elote and esquites for forty years. Another family prepares carnitas using the same copper cazo their grandfather commissioned in 1978. The density and specificity create an edible map of regional agriculture: blue corn from Nayarit, avocados from the highlands, lime and chili varieties that thrive only in coastal microclimates. The vendors themselves serve as informal historians, explaining why certain dishes appear only on Thursdays or why a particular salsa requires three days of fermentation. Puerto Vallarta's geography shapes its street food culture in measurable ways. The city sits where the Sierra Madre Occidental meets the Pacific, granting access to both mountain livestock and daily seafood landings. Morning fish markets supply the evening taco stands, and the logistical chain is short enough that red snapper caught at dawn appears on a comal by six PM. This hyper-local supply rhythm distinguishes Puerto Vallarta food tours from those in landlocked cities, where ingredients travel farther and menus shift more slowly. The evening timing of most street food activity also reflects climate: daytime heat discourages heavy eating, so the serious cooking begins at dusk when temperatures drop and the town's social center shifts outdoors. By eight PM, entire blocks transform into open-air dining corridors, strung with lights and dense with the scent of charred tortillas and griddled chorizo.