The Problem of Grapevine Springs — Dean Wesley Smith

Duster Kendal lost an Idaho mining town called Grapevine Springs. In 2020 he knew the town, spent time there. In 1901 the valley sat empty.
The town never existed. Not possible.
Duster needed to get back to the year 2020 to solve the mystery of the lost mining town.
A standalone story that introduces a new mining town and new characters into the Thunder Mountain world of westerns and time travel.