The online Washington Post has a great story (with video) of a 300-mile paddle of the Klamath River (class III-IV+) by a group of Native American teenagers, 13-17, after the removal of some obsolete dams. There may be a paywall, but if you can get it, it's really inspiring.
https://www.washingtonpost.com/nation/interactive/2025/klamath-river-kayak-journey/?itid=hp_national_p006_f006