Event

Public Astronomy Program  

 

Constellations - Stories in the Sky 

diagram of the Big DipperWhat is a constellation, and why do we see different ones through the seasons in a year? What stories are associated with the constellations?

 

 

 

Date: Saturday, April 18, 2026

Time: 7 p.m. - 11 p.m. Pacific

Location: Mount Diablo - Lower Summit Parking Lot
Summit Rd
Clayton, CA 94517

Information for Visitors

Location Details

Mount Diablo - Lower Summit Parking Lot

Lower Summit Parking Lot off Summit Road - almost to the top of Mount Diablo

Notes:

Click here for the full schedule of Public Astronomy Nights.

The park gates close around sunset, so be certain to arrive in plenty of time.
The temperature on the mountain can drop considerably during the evening, so dress warmly. Keep in mind that this is a state park and, as such, park rules apply, including any gate fees.

Two or three times during the session, visitors will be escorted off the mountain in groups. Departure will be by way of the North Gate (this becomes Oak Grove Road in Walnut Creek once you are outside the confines of the park.)

Events are only canceled due to rain or fire hazard. Don't be put off by somewhat overcast skies. Often, when it is overcast in the late afternoon, by the time night arrives on the mountain viewing is fine.

If you would like advice on current conditions, you can usually reach a person in the South Gate kiosk until sunset at (925) 837-0904. For more information, call the Mt. Diablo "Hotline": (925) 837-2525

UPCOMING EVENTS

Mon 4/13/2026
7 p.m. - 8 p.m. Pacific
MDAS Board Meeting
Thu 4/16/2026
7:30 p.m. - 9 p.m. Pacific
Fallon MS Astronomy Night Fallon Middle School Blacktop
3601 Kohnen Way
Dublin, CA
Sat 4/18/2026
7 p.m. - 11 p.m. Pacific
Public Astronomy Program: Constellations - Stories in the Sky Mount Diablo - Lower Summit Parking Lot
Summit Rd
Clayton, CA
Tue 4/21/2026
4:30 p.m. - 6 p.m. Pacific
Rheem Science Fair Donald L. Rheem Elementary School
90 Laird Dr Moraga, CA 94556
Moraga, CA