Blink, and you might miss it.
Adobe Falls isn’t Niagara Falls — or anything close — but after winter rains, a seasonal waterfall briefly appears in a narrow Del Cerro canyon, hidden beneath streets, homes, and San Diego State University property.
The waterfall forms along Alvarado Creek, which drains parts of eastern San Diego, including the SDSU area and surrounding neighborhoods. In wet months, runoff moves through a steep canyon and drops over a short rock ledge known locally as Adobe Falls. In dry periods, the flow often fades to a trickle or disappears entirely, leaving exposed sandstone and a shaded canyon bed…