From the event website:
"The Bay Area Mathematical Olympiad (BAMO) consists of three annual competitions:
- Two exams, each taken by about 200 students, with 4 or 5 proof-type math problems to be solved in 4 hours. One exam is for students in 8th grade and under, and the other for students in 12th grade and under. They are held on the last Tuesday of every February, at schools and several open sites around the Bay Area.
- An exam for teachers, giving an opportunity to show how to use deeper mathematical knowledge to be more successful in the classroom. Typically held on the Sunday immediately preceding the student exam, teachers come together for a social event as well as an exam.
BAMO is supported by the Mathematical Sciences Research Institute through a grant from Firedoll Foundation."
For more information, see the Bay Area Mathematical Olympiad website.