For more detail this asset from the Unity Asset Store: Click Here
This is a paid asset, but now you can download Coast Landscape Racing Track for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Coast Landscape Racing Track v1.5
“If possible, please buy the package to support the developer”
This package contains a coast landscape usable as racing track or a first person action game.
The scene is only basicly decorated. With the lates version we added some trees to the scene.
Collision-Meshes for walls and ground, skydome and all textures are included.
Perfect scene for prototyping and gameplay testings.
Textures-sizes between 1024×1024 to 4096×1024.
The scene is not(!) created with the Unity-Terrain.
Total Polycount about 150.000
Works with Unity 5, 2017, 2018.
Adam
Please upload more racing tracks. Thanks a lot.