United States Earth Science Organization

The United States Earth Science Organization

The USESO holds a competition for high school students in the United States designed to promote Earth science education on a national scale. In preparing students for the International Earth Science Olympiad (IESO), our programs nurture the scientific, practical, and team skills necessary for success in the advocacy of Earth’s global systems. More about us.

Announcements coming soon!

How to Participate

The USESO National Open Exam takes place each year in the spring, and is the first step towards the USESO Training Camp and IESO. Students may register anytime from January to April. To be notified when registration opens, please sign up here!

The exam is held online in April for all students and determines those invited to the Training Camp. The syllabus and supplemental materials for the Open Exam and the Training Camp can be found under Preparation. Additionally, students often find Past Exams to be a valuable resource.

Students selected from the Open Exam are invited to a week-long residential camp in the summer (usually late June to early July) to learn, meet fellow Earth science enthusiasts, and prepare for the IESO. See Training Camp for eligibility and more information.

Important Dates

2022 USESO

To be determined – tentatively similar to 2021

2021 USESO

  • April 3, 2021: Deadline to register for the National Open Exam
  • April 10, 2021 @ 11am GMT-7 (PDT): National Open Exam 
  • May 1, 2021: Release of results from the national selection process
  • June 27 – July 3, 2021: USESO Training Camp (virtual)
  • July 11 – July 18, 2021: Junior Program (virtual)

Stay updated.

Receive email notifications for registration availability, upcoming deadlines, and published materials (e.g. exam releases).


The International Earth Science Olympiad (IESO) is an international competition organized under the guidance of the International Geological Education Organization (IGEO). Each year, the top earth science students from over forty participating countries attend the IESO. Students at the IESO compete individually as well as in teams of students from multiple countries.

The 2021 IESO is hosted by Russia, held virtually.