Problem importing 3D obj as Terrain

Can I import a 3D obj (a canyon landscape) as a terrain - do I even need to? When I import the 3d obj it places my landscape in space outside of any camera view, and maybe my settings are off, but I can’t place a character or fps controller in the landscape/terrain. I can’t seem to zoom to ground level or place anything on ground level. I’ve added/removed cameras but the model doesn’t seem to be recognized as anything. (It imports as 8 meshes within a default child objects within the import, I can manipulate these layers and add my premade texture).

It’s imperative this specific terrain/landscape be used for this project to use with Oculus.

Terrain in Unity is not a simple 3d mesh. It is a generated at runtime from a heightmap array and sampled with dynamic LOD that changes based on the camera.

You can import an .obj file as a regular mesh and add a mesh collider to it to use as the “terrain” in your game, but not using any of the Unity terrain component features (like grass, splatmap etc.)