Based on you interest in math, your potential choices could be quite varied, ranging from a tech-oriented school (e.g., Harvey Mudd, MIT, Caltech) to an academically balanced public or private university (e.g., UCLA, UCB, Brown) to a smaller, undergraduate-focused college (e.g., Pomona, Williams, Amherst, Hamilton, Haverford) to a women’s college (e.g., Bryn Mawr).
This link, which includes the schools named above, as well as a few moderately selective choices, will offer you a range of colleges to research further: