Please look at the screenshot below, there are a lot of trees on the main track of the Santa Anita Park racetrack (horse racing in Arcadia, CA, to the East of LA). Probably a fix on a future update for those who love horse racing as much as flight simulation and Aerofly.
[Blocked Image: https://c1.staticflickr.com/5/4206/34260539744_c579f8d354_h.jpg]
Cheers, Ed