April 13th - 27th, 2026

Welcome to the Lexington High School Invitational (LexSO), open to Division B and C teams across the country! Our invitational will take place in in mid April, providing practice opportunities for qualifying teams before nationals, and a reason to extend the season for non-qualifying teams because we all need more Science Olympiad in our lives! We will run all 23 events in the Satellite SO format using national-level rules. BOTH written and build tests will have a nearly two-week long open testing for flexible scheduling. As the tournament approaches, a full event supervisor list will be available on our website. Our test writers mainly compose of highly qualified students from the top Massachusetts schools, as well as competitors from across the country.

Registration is $45 for the first team and $35 for each additional team. Massachusetts schools get a special discount of $30/team. We will not be giving out medals this year. Instead, we will be awarding top performers with custom art trading cards illustrated by our very own event supervisors and directors! Fee waivers are available, please reach out to us.