A gray whale that swam 20 miles up a Washington state river is found dead

Officials believed the population was rebounding, but the most recent count from 2025 instead showed a continuing decline. The federal agency estimated there were about 13,000 gray whales, the lowest count since the 1970s.

“A lot of these gray whales are looking very emaciated, very thin,” Calambokidis said.

Their migration north is typically the most challenging period for gray whales, the longest they’ve gone without eating, forcing the animals to use up their nutritional reserves.

“When that happens, you often see gray whales in a more desperate search for new areas to feed,” Calambokidis said. “That’s the most likely context for this whale.”

Researchers will attempt to examine the whale, possibly as soon as Monday.

It entered the north fork of the Willapa River on Wednesday, via a bay about 185 miles (298 kilometres) southwest of Seattle. Residents gathered on bridges along the river just to catch glimpses of the massive mammal and flooded social media with photos and video of it expelling air through its blowhole.

While the gray whale appeared thin, it was behaving normally and didn’t appear to have any injuries, the nonprofit Cascadia Research Collective said in a Facebook post.

The organisation was giving the whale time and space to leave the river on its own, but when researchers attempted to find it Friday, the animal had travelled further upriver into waters that were unnavigable by boat, Calambokidis said.