Rural Action's Joe Brehm found river otter tracks on Sunday Creek near Glouster, a stream once poisoned by mine runoff where otters had not been reported in more than 100 years.
More than 40 volunteers, including farmers, equipment operators, and Team Rubicon, opened more than a mile of Ki'iki'i Stream after the community waited decades for permission.
The 20th annual Yellowstone River Cleanup logged 3,277 volunteer hours. Crews pulled 191 tires, three engine blocks, and 16,170 pounds of trash, and recycled 75,328 pounds of metal.
On a river where fish are scarce, most of the Baniwa fishers interviewed do not treat otters as rivals. They move, wait, or quiet the boat, and many call the otters guardians of the water.