A note on safety: Mushroom identification is difficult, even for experts. In December 2025, the California Department of Public Health issued an advisory following multiple mushroom poisoning cases in Monterey and San Francisco counties. These incidents are a reminder of how easily mushrooms can be confused. For beginners especially, we recommend enjoying mushroom spotting as a way to learn and observe—rather than foraging for food.
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To stumble across a fungus in its natural habitat can feel so magical. Perhaps the mushroom looks like something plucked out of an animated movie, with its bright red cap and white stalk. Or maybe it’s bulbous, brown, and blends into the forest floor. As POST’s Senior Stewardship Project Manager, I see mushrooms as more than just forest curiosities. In fact, they’re signs of a living, breathing ecosystem at work that keeps our forests resilient and thriving. Getting to know the many species of our region is both rewarding and inspiring, and I have plenty of useful tips for how you can do it safely and enjoyably.
Remember: POST’s main advice to local hikers is to look but not touch! Being able to spot these beauties in the wild is a memorable treat on its own.
Want to learn more about fungi and the hidden networks that support forests? Join us for our Fungi Fundamentals online event on Tuesday, January 27 at 7:00 p.m. with Christian Schwarz, fungal ecologist and author.
Bay Area Mushrooms Abound
Mushrooms grow all over the Bay Area: the combination of our mild winters and moist coastal climate is perfect for many types of fungi. There are plenty of places where you can see these fascinating organisms; you just need to know where and, more importantly, when to look. Exploring during the right season and under the right conditions dramatically increases your chances of spotting them.
Keep in mind, though, that while seeing mushrooms is exciting, foraging is off-limits in protected local open spaces. Mushrooms play a crucial role in the ecosystem, and removing them can disrupt the delicate balance of the forest. Always check land-use rules before considering any kind of collection, and remember: private land always requires permission!
TIPS FOR SPOTTING MUSHROOMS
Step One: Before You Go … Know What Grows
You can expect to see certain mushrooms in different plant communities, soil types, and forest types. Manzanitas and shrubs tend to have their own associated species that differ from the fungi you will see in an oak or pine woodland. For example, chanterelles often grow on the edges where hardwoods (e.g., oak and madrone) and conifers (e.g., doug fir and redwood) meet, whereas oyster mushrooms typically grow on fallen Bay logs.
Step Two: Get Outside in the Winter Months (Ideally, After a Downpour)
The best time to see mushrooms is after a rainfall. The main fruiting seasons run from mid-October to early April, when the moisture in the soil helps mushrooms surface. In fact, they often appear larger and brighter 24-to-48 hours after it rains.
Step Three: Seek Shade and Vibrant Hues
As you make your way along a trail, look for cool and shaded spots. Be sure and scan the forest floor for pops of color.
Step Four: Take Only Photos and Memories
Because the intricate fungal network spans far and remains delicate, tread lightly and avoid disturbing mushrooms unless you have permission to collect them. Stay on marked trails to help sustain the well-being of these ecosystems while you enjoy their beauty.
WHERE TO GO
The Bay Area is home to stunning natural spaces, including forests, estuaries, wetlands, and woodlands. All you have to do is step outside or take a short drive, and you’re sure to be surrounded by wonder. Here are a few places where you’re likely to spot mushrooms during fruiting seasons.
Bear Creek Redwoods
This redwood preserve is located just three miles away from Los Gatos. In 1999, in partnership with the Midpeninsula Regional Open Space District, POST protected this preserve from being developed into a golf course with luxury estate homes. Now, its biologically rich ecosystem provides habitat for a diversity of wildlife and organisms. Mushrooms commonly found in this area include different species of oyster mushrooms, golden mushrooms, chanterelles, and turkey tail, among many others. The best places to look are around the base of old trees and near mossy logs.
Purisima Creek Redwoods
Purisima Creek Redwoods Preserve lies on the western slopes of the Santa Cruz Mountains. In 2005, POST protected it as part of the Bay to Sea Trail, with segments linking landscapes from the mountains to the ocean. Coast redwoods cover most of the 5,412-acre preserve, offering shaded, moist forests perfect for ectomycorrhizal fungi (which exchange nutrients with their hosts) and decomposers, like a Wood Blewit and Apricot Jelly (which break down dead leaves and woods). One of the jewels of the preserve is Purisima Creek Canyon, with its water that rushes by ferns and wildflowers.
Mount Madonna
Mount Madonna County Park sits at the southern end of the Santa Cruz Mountains, spanning about 4,605 acres. Its landscape has redwood forests, oak woodlands, chaparral, and grasslands. This diversity increases your chances of seeing all kinds of mushrooms. Oak woodlands are warm and dry and have abundant symbiotic fungi. Grassy meadows, being sunny, attract more decomposers.
El Corte de Madera
El Corte de Madera Creek Preserve is home to more than 36 miles of multi-use trails. You’ll find redwood forests, coastal and forest views, a giant sandstone formation, and a nearly 2000-year-old tree. Here, you may also find many of the mushrooms mentioned above, as this preserve is also covered in thick redwood groves.
IDENTIFYING THE MUSHROOMS
While exploring these places, you might want to learn more about the mushrooms you encounter.
FUN FACT: Scientists estimate that there are approximately 12 million fungal species on the planet!
It is always a treat to come across a mushroom you’ve never seen before. Maybe you recognize the shape or color, but aren’t sure about the species. There are a few apps that can help you learn a little more about what you’re looking at:
- Seek by iNaturalist can help identify plants, animals, or fungi. It also offers guides that will point you toward locations where you can see a variety of mushrooms.
- Shroomify features a blooming calendar and local filter function, which helps you identify the species most likely to appear in your area, as well as when you’ll have the best chance of spotting them.
Although these apps can be great identification tools, many users report that their accuracy levels fluctuate. Some species are poisonous and have look-alikes, so misidentifying mushrooms can have dangerous results! Want to learn more? Try supplementing these resources with information from regional mushroom societies.
I cannot emphasize this point enough: Never eat a mushroom from just looking at photos or reading descriptions.
HOW TO RECREATE RESPONSIBLY WHILE EXPLORING BAY AREA MUSHROOMS
The Bay Area offers diverse habitats to explore during fruiting seasons: remember that when you go matters more than where you go, and that the best time to see mushrooms is a day or two after it rains. Also keep in mind that foraging — including picking or collecting mushrooms — isn’t allowed in local open spaces. Always check land-use rules before heading out, and walk with care. Going off-trail can damage fungi, harm native plants, spread invasive species, and cause erosion. Tread carefully and let these magical organisms thrive.
GRAB YOUR GALOSHES AND GET OUTSIDE
The next time it rains, step outside and take a quiet walk. Every outing is a chance to connect with the magic of our local ecosystems, deepen your appreciation for nature, and witness the incredible role fungi play in keeping our forests healthy. Grab your rain boots, open your eyes, and let the forest surprise you — the magic is out there, waiting!
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Peninsula Open Space Trust (POST) protects open space on the Peninsula and in the South Bay for the benefit of all. Since its founding in 1977, POST has been responsible for saving more than 97,000 acres as permanently protected land in San Mateo, Santa Clara and Santa Cruz counties. Learn more
