Example of Redwoods in Redwood National and State Parks (Hyperion not pictured) Hyperion is the name of a coast redwood (Sequoia sempervirens) in Northern California that was measured at 115.61 m (379.3 ft), which ranks it as the world's tallest known living tree. After 2013, new tall coast redwoods were found, research reports omit tree names, and previously known tallest redwoods grew, fell, or lost height.