The Cascade red fox is the rarest species that you have a decent chance of seeing if you spend enough time on Rainier.

In 2022 the WA Fish and Wildlife Commission listed them as endangered. The reasons for population decline are not fully understood, as there's still a lot we don't know about these beautiful animals. One theory is that warmer and wetter winters are allowing coyotes to range higher during the cold months, increasing competition and possibly also predation. Foxes do not hibernate or move seasonally lower, braving the full savagery of Rainier's subalpine throughout the winter months.

Paradoxically for an endangered species, foxes that have been fed by tourists can become begging nuisances around busy areas of the park. This is dangerous for them due to the formula: fox + vehicle traffic = dead fox. DON'T FEED THE FOXES, PEOPLE!

Within a single litter individuals may come out red, tan, black, or silver, but they all have black forelegs and a white-tipped tail.