We picked it up for a closer look:
It seemed like a tooth...but from what type of animal?
My mind considered some exotic possibilities:
Could it be a Sperm Whale (Physeter macrocephalus) tooth?
An Orca (Orcinus orca) tooth?
Or a Steller Sea Lion (Eumetopias jubatus) tooth?
A little later I thought, how about a Grizzly Bear (Ursus arctos horribilis) tooth?
Eric even wondered about part of a Woolly Mammoth (Mammuthus primigenius) tooth?
Well, I don't know for sure that it's a tooth, but it's fun to think about the options. It could be a different type of bone (and note: I think it might be fossilized.)
Here's a photo with a ruler for scale. It's ~5 cm (2 inches) long.
If you have ideas about what this is and what type of animal it's from, I'd love to hear your thoughts.