Mountain Vista High SchoolSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Mountain Vista High School.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
AUG
3
Open Enrollment for 2nd Round Ends for 2026 – 2027
AUG
4
New Teacher Orientation
AUG
5
New Teacher Orientation
AUG
6
Teacher Work Day
AUG
7
Professional Development Day
AUG
10
Professional Development Day
AUG
11
Teacher Work Day
AUG
12
First Day of School
SEP
7
Labor Day
SEP
21
Professional Development Day
OCT
12
Fall Break
NOV
6
Professional Development Day
NOV
23
Thanksgiving Break
NOV
25
Compensation Day
NOV
26
Thanksgiving Holiday
DEC
18
Teacher Work Day
DEC
21
Winter Break
DEC
24
Christmas Holiday
JAN
1
New Years Day
JAN
4
Teacher Work Day
JAN
18
MLK Holiday
FEB
12
Professional Development Day
FEB
15
Presidents Day
MAR
15
Spring Break
APR
23
Professional Development Day
MAY
27
Last Day of School for Students
MAY
28
Teacher Work Day
MAY
31
Memorial Day
JUN
18
Juneteenth Holiday
Partner TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Mountain Vista High School.
National Tests
August 7, 2026
SAT — National
Registration deadline
August 11, 2026
SAT — National
Late registration deadline
August 14, 2026
ACT — National
Registration deadline
August 22, 2026
SAT — National
Test date
August 28, 2026
SAT — National
Registration deadline
September 1, 2026
ACT — National
Late registration deadline
State Assessments
January 11, 2027 – February 12, 2027
WIDA ACCESS
Testing window
CO
January 11, 2027 – February 12, 2027
WIDA Alternate ACCESS
Testing window
CO
April 5, 2027 – April 23, 2027
CMAS
Testing window
CO
April 5, 2027 – April 23, 2027
CoAlt
Testing window
CO