A wildlife intern shot video of her encounter with a lone wolf, and then added advice of what to do if it ever happens to you.
Her main takeaway is to make sure the wolf sees you because it'll usually leave. If it doesn't see you, a shout and an arm wave should do the trick.
She also added instructions in the text about what to do if the wolf gets aggressive. In that case, grab your kids and dogs and slowly move away. And if it attacks, fight back and try to look large. And definitely use mace or bear spray if you have that.