Public elementary school · TK–5 · Mt. Diablo Unified School District
Mt. Diablo Elementary
- Address
- 5880 Mt. Zion Drive, Clayton, CA 94517 (directions)
- Office
- (925) 672-4840
School day
Wednesday is the minimum day. Transitional kindergarten runs in two sessions.
| Students | Mon, Tue, Thu, Fri | Wednesday (minimum day) |
|---|---|---|
| TK morning | 8:00 a.m.–12:00 p.m. | 8:00 a.m.–11:15 a.m. |
| TK afternoon | 9:55 a.m.–1:55 p.m. | 9:55 a.m.–1:10 p.m. |
| Kindergarten–Grade 5 | 8:00 a.m.–2:30 p.m. | 8:00 a.m.–1:20 p.m. |
| Students | Conference days (Nov 2–13) | Last day of school (June 2, 2027) |
|---|---|---|
| TK morning | 8:00 a.m.–12:45 p.m. | 8:00 a.m.–11:05 a.m. |
| TK afternoon | 8:00 a.m.–12:45 p.m. | 8:00 a.m.–11:05 a.m. |
| Kindergarten–Grade 5 | 8:00 a.m.–12:45 p.m. | 8:00 a.m.–12:00 p.m. |
TK afternoon, conference days: Starts at 8:00 a.m. on conference days, as published.
Check the official calendar for minimum days and exceptions. Source: Official bell schedule.
About the school
Mt. Diablo Elementary is a public TK–5 school in Clayton, part of Mt. Diablo Unified School District. Find school-day times, attendance contacts and official family resources below.
Parent shortcuts
Report an absence
Email or call the school. Include your child's name, your name and relationship, the absence dates, and the reason.
Email mdesattendance@mdusd.orgCall (925) 672-4840Official instructions
Know the schedule
Regular days, Wednesday, conference days and the last day, from the school's published bell schedule.
Lunch
Menus and meal information are published by the district.
Enroll
Enrollment goes through the district. Which school an address belongs to is the district's call, not the city line.
Contact the school
Office (925) 672-4840. Principal: Sara Harris · harrissara@mdusd.org.
Visiting the campus
The school publishes a campus map. For drop-off, pickup and check-in, ask the office; the current procedure is not something we can confirm here.
School calendar
Check the school calendar for dates, events and schedule changes.
School calendar of eventsDistrict calendar: school year and breaks
Getting involved
- Volunteering (district process) — Requirements vary by role.
- School Site Council — Meeting records.
Childcare options
- On campus — Clayton Community School. Clayton Community School provides preschool and TK–5 before- and after-school care on the Mt. Diablo Elementary campus. Contact the provider about eligibility and schedules.
- Provider-reported transportation — Clayton KinderCare on Main St. Provider lists Mt. Diablo Elementary among schools served by its transportation program. Confirm current transportation schedule and eligibility directly with KinderCare.
Other ways to get involved in Clayton →
Official resources
Campus
For families
- Family and Student Handbook (2025–2026) — The school’s published edition is dated 2025–2026; check with the school for updates.
- School ParentSquare link