Life expectancy for a Barghest

[Yogibear41]

Is it stated anywhere how long a Barghest can live until it dies of old age? Do they die of old age?

[Syrinth]

I'd imagine that, as an Outsider, Barghests are effectively immortal as far as aging goes.

That is not a definitive statement based on any knowledge of Barghests, more just an assumption based on the Outsider Type.

[Silva Stormrage]

Outsiders don't age and thus a Barghest is going to live until killed in combat or accident or something similar. They don't age.