The most apparent threat on the beach are not necessarily bears, though fresh tracks are always a heart thumper, it's birds.
This is the view I get when attacked by seagulls or arctic terns. Want to spend a nice evening on the beach running or walking, think again. These birds don't just swoop in for a scare but actually have pecked at times. Wave your arms around trying to spook them just makes it worse and they call in reinforcements to harass you the whole stretch of beach you want to run on. The chainsaw temporarily drives them away but I still keep a wary eye out. Usually, as the summer wears on the baby terns and seagulls mature and the protective parents aren't as vicious but this year more people are out on the beach (gathering wood) and (I think) more irritated (birds not people).