Not a good sign

When you are out for a run, and when you encounter this sign, and when the only part of it you can read is クマ and the exclamation mark, it’s a bit scary.

Especially when the sign is at a fork in the road. Should I go right, veer left, or perhaps just turn around and retrace my route?

These two roads diverged in a wood, and I took the one on the left. A couple days later, I took the left road again. Another time I ventured back simply to take a photo of the sign, and then retraced my route back up the hill.