Summer Programs in California 2026 | Pre-College & STEM Camps

Summer is the highest-leverage time on a student's calendar. A focused summer program lets you go deep on a subject, live on a college campus, and produce something tangible while school is out. California offers an unmatched concentration of programs, from Stanford, Caltech, and the UC system to Silicon Valley tech and San Diego biotech.

Options include selective pre-college programs at universities, STEM intensives like SSP and COSMOS, arts and writing institutes, and free, fully funded programs for students with financial need.

How you spend your summers tells colleges what you choose to do with unstructured time — a powerful indicator of genuine interest.

How to get started with summer programs

  1. Start in the fall — the best summer programs have December–February deadlines for the following summer.
  2. Prioritize selective, free or aid-supported programs (SSP, MITES, COSMOS, TASS) over pay-to-play enrichment.
  3. Pick programs that go deep on one interest and produce something tangible — a project, portfolio, or paper.
  4. Line up recommendations early and give teachers three weeks' notice with a short brag sheet.
  5. Have a strong plan B: a local research reach-out, a self-directed project, or a virtual program you can run yourself.

Featured programs

Browse 9+ curated programs for high school students:

Frequently asked questions

Are these summer programs only in California?

These programs are based in or strongly tied to California, but many also accept students from out of state and some offer virtual participation. Always check eligibility on each listing.

Are pre-college summer programs worth it?

The most valuable programs are selective, free or aid-supported, and tied to a clear interest. Pay-to-play enrichment is fine for learning but carries less admissions weight.

Where can I find free summer programs?

Many top programs (SSP, MITES, COSMOS, and Telluride/TASS) are free or need-blind. See our guide to the best free summer programs.

When are summer program deadlines?

Most fall between December and February for the following summer. Apply early and track deadlines with our free Activities Tracker.