What are my chances?

<p>I live in wyoming. 3.8-4.0 GPA (starting IB next year, and assuming I keep my grades). Do extra curricular activities (sports, VERY avid musician, gonna get a job pretty soon). If I wanna get into a place like Stanford, can you give me a minimum ACT score that I would need to get to have a good chance of getting in? Any other helpful tips would be gratefully welcomed (was that good word choice for that last sentence?0.o)</p>