Upcoming Events

Multiple Dates
Sat, May 23
Wildflower & Pollinator Walk
Mitchell Canyon Visitors Center
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May 23, 2026, 9:00 AM – 12:30 PM
Mitchell Canyon Visitors Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Registration Required
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Multiple Dates
Wed, Jun 10
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Jun 10, 2026, 8:30 AM – 12:30 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Sat, Jun 20
Summer Solstice Saunter
Mitchell Canyon Visitors Center
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Jun 20, 2026, 7:00 PM – 9:30 PM
Mitchell Canyon Visitors Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Registration Required
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Multiple Dates
Sat, Jun 20
The Moon, Earth’s Lost Rock
Lower Summit Parking Lot
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Jun 20, 2026, 8:00 PM – 11:00 PM
Lower Summit Parking Lot, Summit Rd, Walnut Creek, CA 94598, USA
Lower Summit Parking Lot
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Wed, Jun 24
Naturalists Field Trip: Panama
Webinar
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Jun 24, 2026, 7:00 PM – 8:00 PM
Webinar
Webinar - Registration Required
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Multiple Dates
Fri, Jun 26
Common Poorwill Hike
Mitchell Canyon Visitors Center
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Jun 26, 2026, 7:00 PM – 10:30 PM
Mitchell Canyon Visitors Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Registration Required
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Multiple Dates
Wed, Jul 08
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Jul 08, 2026, 8:30 AM – 12:30 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Sat, Jul 18
175th Anniversary of Mount Diablo Initial Point
Summit Museum
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Jul 18, 2026, 10:00 AM – 4:00 PM
Summit Museum, Summit Rd, Walnut Creek, CA 94598, USA
Celebration at Mount Diablo Summit
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Multiple Dates
Sat, Jul 18
We Are Stardust!
Lower Summit Parking Lot
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Jul 18, 2026, 8:00 PM – 11:00 PM
Lower Summit Parking Lot, Summit Rd, Walnut Creek, CA 94598, USA
Lower Summit Parking Lot
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Multiple Dates
Fri, Jul 31
Common Poorwill Hike
Mitchell Canyon Visitors Center
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Jul 31, 2026, 7:00 PM – 10:30 PM
Mitchell Canyon Visitors Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Registration Required
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Multiple Dates
Wed, Aug 12
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Aug 12, 2026, 8:30 AM – 12:30 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Multiple Dates
Sat, Aug 29
Sunset to Moonrise
Lower Summit Parking Lot
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Aug 29, 2026, 7:00 PM – 10:00 PM
Lower Summit Parking Lot, Summit Rd, Walnut Creek, CA 94598, USA
Lower Summit Parking Lot
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Multiple Dates
Wed, Sep 09
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Sep 09, 2026, 8:30 AM – 12:30 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Multiple Dates
Sat, Sep 12
Are You Solar Powered?
Lower Summit Parking Lot
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Sep 12, 2026, 6:30 PM – 9:30 PM
Lower Summit Parking Lot, Summit Rd, Walnut Creek, CA 94598, USA
Lower Summit Parking Lot
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Multiple Dates
Sat, Oct 10
CubeSats, the Small Satellite Revolution
Lower Summit Parking Lot
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Oct 10, 2026, 6:00 PM – 9:00 PM
Lower Summit Parking Lot, Summit Rd, Walnut Creek, CA 94598, USA
Lower Summit Parking Lot
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Multiple Dates
Wed, Oct 14
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Oct 14, 2026, 8:30 AM – 12:30 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Multiple Dates
Wed, Nov 11
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Nov 11, 2026, 9:00 AM – 1:00 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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Multiple Dates
Wed, Dec 09
Wonder Hikes 2026
Mitchell Canyon Visitor Center
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Dec 09, 2026, 9:00 AM – 1:00 PM
Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA
Reservation required
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