New Mexico Bureau of Land Management Rivers Page.
The reaches of the Taos Box area are...
Ute Mountain (Class II),
Razors (Class III/IV),
Upper Box (Class V/V+),
Lower Box (Class III/IV),
Pilar (Class III/IV),
Otowi Bridge (Class III),
Red River (Class IV),
Rio Pueblo (Class V+), and
Rio Embudo (Class V+).