Riverstone International School is a premier, private in , offering day and boarding students challenging opportunities and the personal support to develop into independent, creative, and collaborative thinkers.
With 400 students enrolled from Preschool through High School, 40 countries are represented in the .
A maximum of 32 students from the U.S. and around the world in grades 8-12 are enrolled in the school`s .
The school`s --, , , , and --provide pathways for students to explore academically and personally. Small classes and strong relationships with teachers facilitate a for students.
One hundred percent of graduates are accepted into 4-year . Alumni credit their connections to teachers, friendships with classmates from around the world, the global context of the IB curriculum, and outdoor experiences as having the biggest impact on their future success.
Quick Facts (2025-26)
- Grades: (51³Ô¹ÏÍø Students) 8-12
- Grades: (Day Students) PK-12
- Enrollment: 320 students
- Yearly Tuition (51³Ô¹ÏÍø Students): $51,000
- Yearly Tuition (Day Students): $24,600
- Acceptance rate: 80%
- Average class size: 18 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
Riverstone International School ranks among the top 20 boarding schools (out of 275 schools) for:
Category
Attribute
Student Test Scores
School Overview
School Focus
College Preparatory
College Preparatory
Grades Offered (51³Ô¹ÏÍø)
8-12
9-12
Grades Offered (Day)
PK-12
6-12
School Type
Co-ed
Co-ed
Secondary Immersion Language
Spanish
n/a
Year Founded
1997
1907
Campus Size
14 acres
130 acres
Colors
White, Blue
Last Day of School
Thu. Jun 4, 2026
Student Body
Enrollment
320 students
320 students
% Students of Color
15%
27%
% International Students
27%
20%
% Students 51³Ô¹ÏÍø
5%
67%
Average SAT Score
1306
(Out of 1600)
(Out of 1600)
* National Avg. »
Average ACT score
31
(Out of 36)
(Out of 36)
*National Avg. »
Offers Post-Grad Year
No
No
Academics and Faculty
Saturday Classes
No
No
Average Class Size
18 students
12
* National Avg. »
Student-Teacher Ratio
7:1
7:1
Number of IB Courses Offered
60
-
% Faculty with Advanced Degree
57%
72%
Summer Program Offered
No
Yes
Tuition Cost
Endowment Size
$4 million
$30 million
Yearly Tuition
(51³Ô¹ÏÍø Students)
(51³Ô¹ÏÍø Students)
$51,000
$69,000
Yearly Tuition
(Day Students)
(Day Students)
$24,600
(Please see this link for additional information by grade level: )
(Please see this link for additional information by grade level: )
$38,000
% Students on Financial Aid
25%
40%
Admissions
Acceptance Rate
80%
64%
Director of Admissions
Adam Hatfield
Alison Cathey
Alison Cathey
Application URL
AP / Advanced Courses
# of AP / Advanced Courses Offered
n/a
18
Courses
IB Biology HL / SLIB Chemistry HL / SL
IB English Language & Literature HL / SLIB Global Politics HL / SL
IB Mandarin HL / SLIB Mathematics: Analysis and Approaches HL / SL
IB Mathematics: Applications and Interpretations HL / SLIB Music HL / SL
IB Physics HL / SLIB Psychology HL / SL
IB Spanish HL / SLIB Theory of Knowledge
IB Visual Art HL / SLIB World Religions SL
MYP ArtMYP English Language and Literature
MYP Health educationMYP Mandarin
MYP Math (skill level based for grades 9 - 10)MYP Music
MYP SpanishMYP10 Chemistry
MYP10 Modern East Asian HistoryMYP10 Personal Project
MYP9 Conceptual PhysicsMYP9 Modern European History
Pamoja Online Language ab-initio FrenchPamoja Online Language ab-initio Mandarin
Pamoja Online Language ab-initio Spanish
Sports
# Interscholastic Sports Offered
18
16
Extracurriculars
Total Extracurricular Organizations
18
23
Extracurriculars
Club or Organization:
Arts and Music Programs:
Recreational Athletic Programs:
Athletic LeadershipGreen Team
Language ClubsMath Club
Programming ClubRobotics Team
SAGA: Sexual and Gender AllianceScience Bowl
Social Change LeadershipStudent Council
Veggie ClubYearbook Club
Arts and Music Programs:
Musical Ensemble Groups
Recreational Athletic Programs:
Climbing ClubKayaking Club
Mountain Biking Club
College Matriculation
College Acceptance Rate
100%
10 Most Popular College Choices (# Enrolled)
School Notes
- Our provides a family-like experience for a maximum of 32 students from the U.S. and around the world. Our downtown Boise dormitory location gives students the opportunity to experience the Pacific Northwest culture and connect with the greater Boise community.
- : Riverstone is one of four IB continuum schools offering a boarding program. Teachers provide guidance and encouragement to students, and Riverstone's three-year average IB diploma program pass rate exceeds the global average.
- : Students explore Idaho and Oregon's mountains and rivers with classmates and teachers.
- Located in the Pacific Northwest, is one of the most liveable and safe cities in the U.S. Our is located in downtown Boise, the third most populous city in the Pacific Northwest, with easy access to skiing, kayaking, and mountain biking. Our four-season climate and safe city provide opportunities for students to recreate, shop, and explore all our beautiful city and state have to offer.
- The school offers a and more than 30 , .
- Riverstone International School accreditations: International Baccalaureate Organization (IBO), National Association of Independent Schools (NAIS), NWAIS, The Association of 51³Ô¹ÏÍø Schools (TABS),AdvancEd
- School Motto: Courageous Journeys
- School Mascot: Otter
Source: Verified school update
Frequently Asked Questions
How much does Riverstone International School cost?
Riverstone International School's tuition is approximately $51,000 for boarding students and $24,600 for day students.
What is the acceptance rate of Riverstone International School?
The acceptance rate of Riverstone International School is 80%, which is higher than the boarding school average of 64%.
What sports does Riverstone International School offer?
Riverstone International School offers 18 interscholastic sports: Alpine Skiing, Basketball, Cheering, Climbing, Cross Country, Cross Country Running, Lacrosse, Mountain Biking, Skiing, Snowboarding, Soccer, Swimming, Swimming and Diving, Tennis, Track, Track and Field, Ultimate Frisbee and Volleyball.
What is Riverstone International School's ranking?
Riverstone International School ranks among the top 20 boarding schools for High ACT scores.
When is the application deadline for Riverstone International School?
The application deadline for Riverstone International School is rolling (applications are reviewed as they are received year-round).
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The nearest boarding school to Riverstone International School is Sun Valley Community School (88.5 miles away)
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