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Tarantulas on Mount Diablo

Male Aphonopelma iodius tarantula on Mount Diablo. Photo by Tony Iwane.

Every fall, at dusk, male tarantulas walk across the slopes of Mount Diablo and look for mates, so CCNH is taking a special trip to a secluded trail to look for these adorable fuzzy denizens of the east bay! We’ll hike about 2 miles round trip and take in the stunning sunset as we also look for mantids, snakes, harvester ants, hawks, and beautiful oak galls.

There is limited space for this event, and we will be meeting at a location outside of the park near North Gate Road then carpooling to a small trail about 2,000 feet up the mountain.

$15 per person. Ages 12 and up. Participants under age 18 must be accompanied by an adult. You must pre-register here:


Earlier Event: August 27
Birds, bikes, and beer!
Later Event: September 15
Derby Creek Augmented Reality Tour