Hey everyone I'm a new dm and I'm running the ghoasts of saltmarsh campaign and we're about to do a side quest in the warthalkeel ruins. On of the pcs ask how far it is from the town of saltmarsh and I can't find any info on this dose any one have any insight on this

Thanks

Anywhere. I assume you are referring to the warthalkeel under this section of the book:

Underwater Locations

The underwater locations in this section can be used for single-session adventures or as side treks to help you fill out the story of Saltmarsh. Each location includes a map, a description, story hooks, and encounters. You can place these locations anywhere near Saltmarsh or off distant shores of your choosing.