F1 Race Track 3D Model Pack 3D model is available on CGTrader for $20. Original author: Round-Square.
STL (Stereolithography, filesize: 56.2 MB), OBJ (OBJ, filesize: 96 MB), FBX (Autodesk FBX, filesize: 58.6 MB), DAE (Collada, filesize: 142 MB), BLEND (Blender, filesize: 15.3 MB)