I want to enter a career in Roller Coaster Building, what should I major in in college/ prepare for in HS?

Architecture, probably. If you're going to build structures, it's probably going to be like architecture. I'm no expert on schools or career paths, but having interned and architecht once and having some connections with the AIA (American Institiute of Architects), I know it's best to take courses and do well in math/ science classes along with art. It's important to be in accellerated math, and to be taking drawing/ sketching classes, as I'm sure this would become routine in your future, regardless of what it may actually be. Very origioinal and unique career ambitions, can't say much more. Good luck!

Mechanical engineering.

you might want to major in Engineering. that is the closest thing for building/designing Roller Coasters.

im 14 and live in klamath fallsoregon and going into to high school. from what ive heard u need a bachleors in science and engineering. and then the rest tehy prepare u for when you find a job. most jobs will be located in florida or california because of the good weather.

Stuctural Engineering Caltech or AIT

Degree in gaming

Engineering, Math, Physics. CAD can show the way to curves, etc, but you will need the knowledge of Stress and Strain and how to apply it.

Engineering, Physics or Architecture would be a start. A masters is probably the level degree you want to shoot for.

Mechanical Engineering would be best, structural wouldn't hurt as a minor.