StopRobi

Hello to all: I like to fly out of, or arrive to, SLLP (the highest commercial airport in the world at 13,300 ft; 4000 mt) on many of my flights. Unfortunately, the main taxiway ("A") from the commercial apron to RWY 28, is just a jagged line of hills, on which it is not possible to taxi. Is there anybody who could fix it, or advice me on how to do it? Many thanks! Roberto