I’ve finally gotten around to adding my In the Light of the Setting Sun supplements to DriveThru. They’re still available on my itch page as well.
These could easily be used together. The hidden entrance to the Lost Valley could easily be found in an old silver mine in the hills near Felicity.
Thunder Lizards of the Lost Valley – Dinosaurs in the Old West
The Town that Stank of Death – Spaghetti-Western influenced sandbox adventure.