"Firefall" Horsetail Fall I almost didn't drive into the park today as I am not a big fan of crowds, and the clouds were swirling around Midpines this afternoon (clouds can prevent the natural firefall from happening). So glad I did. This was the most spectacular natural #firefall I have seen in my 20 years in Yosemite National Park. 100% nature-a couple of weeks every February if conditions are right, the light from the setting sun hits Horsetail Fall just right to produce this “firefall.”