It's no secret, I live in Fairview, WY 6,200', about 2,000' too high for good all around performance for the non-turboed engine, and of course way too high for the tracks. Now on the up side, no matter where I look, 360 degrees, there is a mountain, some as high as 11,000 feet, and the decendents of every wild thing that God created are still around today that was here when Lewis and Clark passed north of here some 200 years ago.