You can use landscape spline to construct a road along the landscape, but you don’t seem to be able to get access to the spline during game play. I want a car to follow along the spline but how do i get access to the landscape spline during the game?
This blog post contains some helpful info on this, though you’ll need to dabble with C++ a bit: Tutorial – How to Access Landscape Splines in Unreal for Pathing – Switchback Studio. Someone also made a free plugin for this, though I don’t know how well it works.
Your best bet would be using one of these two methods to get the points’ transforms, then copy those to a new Blueprint with a spline component.