• December 1, 2025: Student registration opens for the 2026 National Open Exam [LINK]
  
• February 28, 2026: National Open Exam student registration deadline [LINK]
  
• March 7, 2026: Proctor Verification form deadline [LINK]
• March 19–23, 2026: National Open Exam window
  
• April 18, 2026: Invitations for Training Camp released
  
• June 13–21, 2026: Training Camp in Tulsa, OK (Top 40 students, invitation only)
  
• June 19, 2026: Deadline for LEES Registration
• July 12–17, 2026: LEES Program
• August 20 – 27, 2026: International Earth Science Olympiad in Turin, Italy (US National Team only)

Last updated May 6, 2026