Quote Originally Posted by Hoosiersmoker View Post
It's always safe until it isn't. And what is a "safe" distance from an active volcano? 1 mile? 10 miles? 100 miles maybe?
Vesuvius is about 6 miles from Naples. Mt. Rainier is about 60 miles from Seattle. Both cities are considered badly threatened by an eruption. The lahars from Mt. Saint Helen reached the Columbia river, 50 miles away.

Personally, I would opt for your largest figure - 100 miles.