A massive piece of driftwood washed ashore recently in La Push, a small community on the northwest coast of Washington's most westerly peninsula. This piece of driftwood is actually called a drift log.
It wasn't measured, but finding trees in the forest between 5 and 10 feet in diameter and a couple hundred feet tall isn't uncommon. Powerful winds accompanied by high tides are required to bring these monsters ashore. LINK: The Presurfer