What's the highest you've ever been in the X-15

[Pilot7893]

With limited fuel, of course. My personal record is 160 kilometers

 

[STSJASON]

With limited fuel my record is 178.6 but I had the B-52 going mach 1

 

[Jarvitä]

124 km, but then again, I've only ever followed the normal flight profiles.

 

[n72.75]

infanite distance from earth spining at infanite speed.
oops..