Thousand Islands High School Building
Welcome to Thousand Islands High School!

Upcoming Events

APR
3

Costa Rica Trip

Start: Apr 3, 2026 12:00 AM End: Apr 12, 2026 12:00 AM

Multi-Day Event

APR
6

Spring Recess - No School, Sand Bay Campus Closed

Start: Apr 6, 2026 12:00 AM End: Apr 13, 2026 12:00 AM

Multi-Day Event

APR
14

NYS Science 8 Exam

Start: Apr 14, 2026 12:00 AM End: Apr 15, 2026 12:00 AM

Multi-Day Event

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