The New River (Karuk: akráah kumásaamvaroo), is a 21.4-mile-long (34.4 km) tributary of the Trinity River in northern California. Running through Denny and Hoboken, it is a good place for advanced kayak and rafting enthusiasts to test their skills. The New River contains rapids ranging from class I to almost class V, with flows ranging from 400-1000+ cfs.