Elwood was a sternwheel steamboat which was built to operate on the Willamette River, in Oregon, but which later operated on the Lewis River in Washington, the Stikine River in Canada, and on Puget Sound. The name of this vessel is sometimes seen spelled "Ellwood". Elwood is probably best known for an incident in 1893, when it was approaching the Madison Street Bridge over the Willamette River in Portland, Oregon. The bridge swung open to allow the steamer to pass. However, a streetcar coming in from the east end of the bridge failed to notice the bridge was open, and ran off into the river in the Madison Street Bridge disaster.