Sorry for so many posts but I give a speech annually at a STEM Outreach Conference on summer programs in STEM so I have a lot of resources. A good free one is at the Colorado School of Mines. http://www.mines.edu/summet The application is still available. and the 2017 dates are on the program website.
This link is a word document that has info about a lot of summer programs. (www.sciserv.org/stp/index-s.htm) I forgot what year this document is from so some of the info may be wrong such as CalTech no longer has YES, but there are still many good links to programs.
The other benefit about applying to a summer program is that it will get you into good practice for doing college applications because the process is very similar. Also for some summer programs you might then get priority or extras points in the admission process for the particular college and I know some colleges will give the students a special small merit scholarship if they attend the college where the summer program was held.
Good luck!