there are 2 other Stanford Math options-
Sumac which is a prestigious Math camp open only to exceptionally talent HS math students-
https://sumac.stanford.edu/
The Stanford University Mathematics Camp [SUMaC] welcomes an elite group of talented rising high school juniors and seniors from around the world for intensive study in advanced mathematics.
Financial aid is available for Sumac.
. this could be a great summer 2016 opportunity for you ! Registration begins in early 2016.
And- Stanford’s college level online math and Physics classes, which are different from their online HS.
this is the online program you really should investigate as it is more appropriate to someone with your level of ability .
https://ohsx.stanford.edu/
Stanford Pre-Collegiate University-Level Online Math & Physics courses bring motivated and academically-talented high school students together to allow them to explore their intellectual passions, develop analytic reasoning and creative thinking, and study directly with expert instructors. These online courses are offered throughout the year and give students the opportunity to take a broad offering of math and physics courses not typically offered in secondary schools.
Applications for the Summer session of Stanford Pre-Collegiate University-Level Online Math & Physics courses are due June 5!!!
here is a link to the courses offered
https://ohsx.stanford.edu/university-math