Skip to main content Currently Reading Yosemite's 'firefall' has become an obsession for photographers aiming to land the perfect shot. Here's how they do it FacebookTwitterEmail 1of2 Photographer Lee DeCovnick says of the glowing Horsetail Fall: “The moment when it lights up, actually refracting, all of a sudden, it just sorts of pops, glowing, lava-like, deep colors with vibrancy, gorgeous.”Lee DeCovnick 2013Show MoreShow Less 2of2 Horsetail Fall in Yosemite National Park is illuminated by rays of the setting sun on Feb. 18, 2019. The firefall phenomenon can occur in the later weeks of February only when conditions are just right.Carlos Avila Gonzalez / The ChronicleShow MoreShow Less