Conservation officers say the unidentified man was walking along a local highway around 8 a.m. PT when he accidentally came between the grizzly and her two cubs.
Conservation Officer Sgt. Len Butler said the man managed to fight off the bear and survive the brief attack.
"Fortunately, it was a very quick attack and [the bear] left him and took off with the cubs," he said.
Butler said there are a lot bears in the area this time of year feeding on salmon spawning in the rivers.
"It's an area where bears and people generally coincide because they're both going for the fish."
"These situations do occur and generally if there is a grizzly attack or charge, you know nine times out of 10 it appears when we deal with them, it's sows and cubs are in those situations."
The man will spend the night in hospital, recovering from a broken arm and puncture wounds, but he is expected to make a full recovery, said Butler.