Astrid is a Man of Dale who works as a scout but mostly as a Courier, carrying items from place to place. As a result she could in theory turn up in a variety of places.
If you have interest after traveling the High Pass, in taking a jaunt through Rivendell on the other side, Fenion will be there to greet you with a song. Also I have Ruivo there who looks a bit more frightening than he really is... he has lots of stories .... or could fix up anything you need at the Forge. One or both!