Mount Coffin was a promontory in what is now Longview, Cowlitz County, Washington, U.S. It served as native burial grounds for the Skillute, a Chinook Jargon speaking tribe who practiced above-ground interment of their deceased. The memaloose illahee, or cemetery was named by Lieutenant William Robert Broughton of George Vancouver's expedition aboard HMS Chatham in 1792. The landmark was leveled for its gravel during construction of the Port of Longview.