Lava Island Falls are rapids on the Deschutes River. Rated a Class 5 for watercraft, they are difficult to navigate because of an island of lava from Lava Butte that blocked part of the river.
References
External links http://www.waterfallswest.com/waterfall.php?id=114 http://www.trails.com/tcatalog_trail.aspx?trailid=CGW008-190 http://www.waterfallsnorthwest.com/nws/waterfall.php?num=2290