X-Plane 9 – Scenery QSAL QSAT Bonneville Salt Flats, UT, USA. The Bonneville Salt Flats is a densely packed salt pan in Tooele County in northwestern Utah. The area is a remnant of the Pleistocene Lake Bonneville and is the largest of many salt flats located west of the Great Salt Lake. The property is public land managed by the Bureau of Land Management and is known for land speed records at the “Bonneville Speedway”. To go along with the recently updated 9.70 Eagle.acf “Active” was contacted and his permission was obtained to post this version of his original scenery package. Important: please read the included documentation. By David Austin.