What is your definition of turbulence? If it's crazy enough, it could be dangerous it fly into. That's the turbulence we mostly know where it is (because flight wouldn't be safe without that knowledge). That includes thunderstorms and wakes from large aircraft.
There is a good band of turbulence that we can't predict, but is typically not dangerous.
There is some like Zeiss Ikon mentioned that is usually OK and somewhat predictable (updrafts that condense at the top, thus being marked with a cloud).
Then there is some that is pretty light and predictable: your own wake. Fly a steep turn circle, and if you do it right, you'll hit a bump that is your own wake.
And, yes, mountains + wind does make turbulence. Just like water flowing over a rock in a river, you get a repeating wave downstream of the mountain/rock. It sweeps into a peak and then drops again, sweeps up into a peak, etc. Near the top of these, there can be rotors, sometimes even rotor clouds, and that is the worst turbulence I have experienced in a GA aircraft: we were in glass smooth updraft and then all of the sudden we rolled until the CFI thought we were going to go into an upset attitude.
Is your definition of turbulence the wings rolling a bit and the nose bumping up and down, or more of a "your stomach while on a roller coaster" type?
If it's the roller coaster feeling, you can make that feeling with how the aircraft is flown. Go a ways up and fly something not quite parabolic arc for something like the swing feeling, or a perfect parabolic arc for a weightless feeling (yes, I can tell you the two a different, from skydiving experience).
If it's the random rolling/pitching, you could just pay for a flight lesson in a GA aircraft, and (at a good margin less than Va) ask the CFI to do their best to simulate (while staying safe) the worst turbulence they've ever experienced, with random inputs. If that's not good enough, do something similar with an aerobatic pilot in an aerobatic plane. If that's not good enough, see if you can somehow arrange a ride with a fighter pilot with a similar request. I highly suspect that somewhere along that progression, you'll find that "that's enough" point!