Beasts & Barbarians Heroic Tale #1: The Cliffs Queen's Court (2011)

From the introduction:

The heroes were crossing the Cairnlands as part
of a caravan, either working as hired guards, or as
passengers traveling from the Marquees to Valkheim.
This morning the caravan was ambushed by a band of
Cairnlander marauders, and only the heroes escaped.
To make matters worse, during their escape, they killed f
the marauders’ chief ’s son! The heroes are presently fleeing
on horseback, with the marauder band in close pursuit.
The chase has lasted several hours, and their horses are
exhausted—if the heroes don’t find refuge soon, they are
almost certainly doomed…

User's summary:

First adventure of a campaign for Beasts & Barbarians