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The North Bay Science Discovery Day is a public, free, non-commercial youth science festival held in Santa Rosa, California. More than 80 companies, agencies, schools, nonprofits, clubs, and others offer over 100 engaging hands-on science, technology, engineering, and mathematics (STEM) activities designed for youth aged 9 to 14; the festival is open to all ages! Discovery Day started in 2011 by U.C. San Francisco and the Buck Institute for Research on Aging; U.C. Agriculture and Natural Resources began co-hosting with the Buck Institute in 2019.


A world where all youth enjoy STEM, recognize the intrinsic and practical value of STEM, are workforce ready, are civically engaged and scientifically literate, and able to harness the power of science as a tool to contribute to solving complex environmental, economic, and social issues.


  1. To spark young people’s wonder and curiosity about science, technology, engineering, and mathematics (STEM);

  2. To strengthen the San Francisco North Bay’s STEM learning ecosystem; and 

  3. To connect the STEM industry, education, and public sectors to deepen and sustain young people’s STEM learning. 

Core Values
From the start in 2011, the North Bay Science Discovery Day has consistently been true to core values. As a result, the festival has developed an excellent reputation as a wonderful event for the community.

  • The festival is completely free (including parking) and available to any who show up at the gates.

  • The target audience is youth of 4th through 8th grades and designed to engage all ages.

  • Exhibitor's participation is accepted based on its ability to engage kids in meaningful ways as well as the quality and appropriateness of STEM content.

  • The festival is a non-commercial event; exhibitors do not engage in selling items or fund raising.

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