The best time to see Yosemite's firefall will likely be ... the phenomenon appears just before sunset on clear days, right as the sun hits the waterfall at a particular angle.

The Yosemite Firefall is ... Horsetail Fall, a seasonal waterfall on the eastern side of El Capitan, only flows in winter and early spring. The Firefall effect happens when: The waterfall has ...

The rare phenomenon happens when light hits a waterfall tumbling down El Capitan. The intensity of the brief annual display in February depends on the volume of water and the cloud cover.

Demonstrators hung the American flag upside down over El Capitan in Yosemite National Park over the weekend. The display protested against the Trump administration’s firing of federal staff.