The heroes have fought Skarja once already much too early in their careers and only survived because they nearly destroyed her heart, forcing her to focus primarily on retrieving it and then retreating to enact repairs over a long period.
That period has ended, and now she's out for revenge. The heroes have just completed the Forest Tower along with much of the rest of the Life's Long Shadows module.
Skarja appeared at the top of the tower, threatening to destroy that which is precious to them in return for their having attempted to harm her own treasure. She then raced away from the tower, right towards the circus grounds.
I want to set up an engaging chase scene and post-chase battle for the 11th-level heroes as they try to get off the tower, through the forests and farm steads, and back to the outskirts of Turpin Rowe, where there friends and families await their return.
The party consists of a bard, a champion, a fighter, an inventor, and a wizard. The wizard can fly, but might be the only one. There are no long range teleportation powers.
They rested and healed up before exiting the tower and so will have full resources and hit points starting off, though they were not expecting to encounter the hag.
How might I make this work? What kinds of checks or obstacles might make sense?
They don't necessarily need to beat Skarja to the circus, indeed they likely can't since she's flying on a really fast Nightmare, so the chase will primarily be about minimizing the time gap and preventing as much carnage at the circus as they can by getting there as quickly as possible.
Any help and advice would be most appreciated.
Our game is this Friday, though I may push it a week since I'm not as ready as I'd like to be and because we have a player out that day (which is not ideal for the climatic end of a module).
Game has been delayed until the evening of next Friday (August 12).
Thank you to everyone that reached out to me via PM. The game went well.