Frazil ice flow the "Dramatic Natural Event"

Summertime visitors to Yosemite National Park miss many of the unique events of winter and early spring. Frazil ice flows are dramatic natural events that occur in the waterfalls of Yosemite Valley during March and April


Yosemite National Park, one of the first wilderness parks in the United States, is best known for its waterfalls, but within its nearly 1,200 square miles, you can find deep valleys, grand meadows, ancient giant sequoias, a vast wilderness area, and much more.