Start of School 2025 -2026

We are excited to welcome you back to school for this new academic year! Below you will find important dates and information related to the start of school. Please scroll down to view all items.

Important Middle School Dates

Orientation Programming
Thursday, September 3: Grade 8 Orientation (Camp Nonesuch and on Campus) 
Friday, September 4: Grades 6 and 7 Orientation (On Campus)
First Week of School
Tuesday, September 8: First day of school - Leadership Lab in Middle School 
Friday, September 11: First day of academic classes in Middle School
Monday, September 14: School picture day
Key Parent Events, Fall 2026
Thursday, September 3: Grade 8 Parent Coffee
Friday, September 4: Grades 6 and 7 Parent Coffees 
Thursday, September 10: Middle School sports begin 
Tuesday, September 15: Middle School Parent Orientation (6:30 p.m.)
Thursday, September 24: Middle School Mini School (6:30 p.m.)
Friday, September 25: Parents' League Welcome Meeting (8:30 a.m.)

Important Upper School Dates

Orientation Programing, Leadership Retreat, and Pre-Season Athletics
August 29-30: Student Advisor Retreat (at Windsor Mountain) 
September 1: Student Leadership Retreat (for students in designated leadership positions, including varsity captains)  
September 1: Grade 9 Welcome 
September 2: Grade 9 on-campus orientation
September 2-3: Grade 10 overnight orientation (at Windsor Mountain)
September 3: Grade 11 orientation
September 4-5: Varsity pre-season practices and tryouts

First Week of School
Tuesday, September 8: First day of school
Thursday, September 10: JV and thirds practices begin 
Monday, September 14: School picture day
Monday and Tuesday, September 14 and 15 (3:30 to 5:00 p.m.): Upper School fall play auditions

Key Parent Events, Fall 2026
Wednesday, September 9 (6:30 p.m.): Conservatory Program Welcome Dinner 
Monday, September 14 (8:30 a.m.): 9th Grade Parent Coffee
Monday, September 14 (6:30 p.m.): 12th Grade Parent Meeting with the College Office
Tuesday, September 15 (8:30 a.m.): 10th Grade Parent Coffee
Wednesday, September 16 (8:30 a.m.): 11th Grade Parent Coffee
Thursday, September 17 (6:30 p.m.): 12th Grade Parent Reception at the Head of School House
Saturday, September 26: Upper School Mini School (8:30 a.m. to 12:30 p.m.)
Monday, September 28 (6:30 p.m):  Grade 9 dinner and discussion
November 23-24: Parent Conferences 




Information for Middle School

Information for Upper School

333 Winter Street Weston, MA 02493
P: 781.235.9300 F: 781.239.3614
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Rivers admits academically qualified students and does not discriminate against students or families on the basis of race, religion, gender, sexual orientation, disability, or ethnic or national origin in the administration of its educational programs, admissions policies, scholarship and loan programs, athletic programs, and other school-administered programs.