These are coast redwoods in Humboldt Redwoods State Park, California. The park is home to the largest continuous block of old-growth redwood forest left on the planet- with some 10,000 acres.
The alluvial flats along its creeks and rivers are prime redwood habitats. The mix of rich soils, water, and fog rolling in from the ocean have produced the planet's tallest forest. Of the 180 known redwoods greater than 350 feet, more than 130 grow here.
Coastal redwoods can be up to 379 feet (115.5 m) in height (without the roots) and up to 26 feet (7.9 m) in diameter at breast height.
Research now shows that the older such trees get, the more wood they put on- nice to see even trees go through a midlife spread!
Photograph by Michael Nichols, National Geographic