A mother bear nicknamed Grazer by the nonprofit appears to be hunting salmon at the top of the falls when one of her cubs is swept away by the water and carried over the waterfall.
Grazer runs into action as her other two cubs go over the fall, running around to the water below and swimming out to pull them to safety.
"And the Mother of the Year award goes to... Grazer!!! All 3 of her cubs ended up going over the falls, thankfully they are all OK!" the post said.