First step: find this ramp, it's near the rocket. After you jump you need to boost over the vertical rock and land on top of another one.
After landing make sure your boost refills. Then you need to make a big jump and land on another floating rock (next pic)
Try to land on this one, but be careful because it's easy to slide down from it.
If you land here you are almost there, you can pretty much boost your way to the top.
That's how you reach the top.