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Mushrooms in Alameda County, California
Updated October 2026 · from open GBIF records
6,967mushroom records
707species recorded
Augbusiest month
6,967 records since 1812 (4,943 in the last 10 years)
Fruiting now
Based on past sightings (mostly since 2011; all years where recent records are few), not a forecast. Weather and place matter a lot, and a listing here says nothing about whether a mushroom is safe.
Usually recorded in January here:
Golden Milk Cap Lactarius alnicola61 January records since 2011
Mulch Maids Leratiomyces percevalii50 January records since 2011
Fly Agaric Amanita muscaria45 January records since 2011
Wood Blewit Lepista nuda42 January records since 2011
Yellow Fieldcap Bolbitius titubans38 January records since 2011
Chip Cherries Leratiomyces ceres38 January records since 2011
Cabbage Parachute Gymnopus brassicolens33 January records since 2011
Turkeytail Trametes versicolor24 January records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune23 January records since 2011
Scurfy Twiglet Tubaria furfuracea20 January records since 2011
Big Sheath Mushroom Volvopluteus gloiocephalus17 January records since 2011
Sulphur Tuft Hypholoma fasciculare16 January records since 2011
Usually recorded in February here:
- Mulch Maids Leratiomyces percevalii42 February records since 2011
Bittersweet Orange Ringless Amanita Amanita velosa29 February records since 2011- Turkeytail Trametes versicolor29 February records since 2011
Hairy Curtain Crust Stereum hirsutum16 February records since 2011- Golden Milk Cap Lactarius alnicola15 February records since 2011
- Chip Cherries Leratiomyces ceres12 February records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune12 February records since 2011
California Golden Chanterelle Cantharellus californicus10 February records since 2011- Yellow Fieldcap Bolbitius titubans10 February records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus9 February records since 2011
- Cabbage Parachute Gymnopus brassicolens8 February records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus8 February records since 2011
Usually recorded in March here:
- Mulch Maids Leratiomyces percevalii50 March records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa22 March records since 2011
Red Cage Clathrus ruber19 March records since 2011- Cabbage Parachute Gymnopus brassicolens13 March records since 2011
- Turkeytail Trametes versicolor13 March records since 2011
- Hairy Curtain Crust Stereum hirsutum10 March records since 2011
Parrot Mushroom Gliophorus psittacinus8 March records since 2011
Deceiver Laccaria laccata8 March records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus7 March records since 2011
- Chip Cherries Leratiomyces ceres6 March records since 2011
Lawyer's Wig Coprinus comatus6 March records since 2011- Scurfy Twiglet Tubaria furfuracea5 March records since 2011
Usually recorded in April here:
- Red Cage Clathrus ruber23 April records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa21 April records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune12 April records since 2011
- Turkeytail Trametes versicolor11 April records since 2011
- Mulch Maids Leratiomyces percevalii10 April records since 2011
Spring Fieldcap Agrocybe praecox8 April records since 2011
Blushing Bride Amanita novinupta8 April records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus6 April records since 2011
Deer Mushroom Pluteus cervinus5 April records since 2011
Artist's Conk Ganoderma brownii5 April records since 2011- Deceiver Laccaria laccata4 April records since 2011
- Cabbage Parachute Gymnopus brassicolens4 April records since 2011
Usually recorded in May here:
- Red Cage Clathrus ruber30 May records since 2011
- Spring Fieldcap Agrocybe praecox4 May records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa3 May records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune3 May records since 2011
Pale Brittlestem Candolleomyces candolleanus2 May records since 2011
California Jack O' Lantern Omphalotus olivascens2 May records since 2011
Flocculose Inkcap Coprinellus flocculosus2 May records since 2011- Turkeytail Trametes versicolor2 May records since 2011
Golden Bracket Fuscoporia gilva2 May records since 2011
Usually recorded in June here:
Candy Cap Lactarius camphoratus6 June records across all years- Red Cage Clathrus ruber6 June records across all years
- Xanthoporia andersonii3 June records across all years
Fairies' Bonnets Coprinellus disseminatus3 June records across all years- Langermannia pachyderma2 June records across all years
Meruliporia incrassata2 June records across all years
Common Fieldcap Agrocybe pediades2 June records across all years- Vitreoporus dichrous2 June records across all years
Meadow Puffball Lycoperdon pratense2 June records across all years
Psathyrella incerta2 June records across all years
Grey Puffball Bovista plumbea2 June records across all years- Daedalea xantha2 June records across all years
Usually recorded in July here:
- Red Cage Clathrus ruber10 July records across all years
Peniophora cinerea3 July records across all years
False Parasol Chlorophyllum molybdites3 July records across all years
Milky Conecap Conocybe apala2 July records across all years
Collybiopsis villosipes2 July records across all years- Meadow Puffball Lycoperdon pratense2 July records across all years
- Candy Cap Lactarius camphoratus2 July records across all years
- Artist's Conk Ganoderma brownii2 July records across all years
- Turkeytail Trametes versicolor2 July records across all years
- Common Porecrust, Split Gill Fungus Schizophyllum commune2 July records across all years
Usually recorded in August here:
- Red Cage Clathrus ruber6 August records since 2011
- Artist's Conk Ganoderma brownii4 August records since 2011
Banded Mottlegill Panaeolus cinctulus3 August records since 2011
Death Cap Amanita phalloides2 August records since 2011- Parasola lilatinctoides2 August records since 2011
Purple Fuzz Punctularia atropurpurascens2 August records since 2011
Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 August records since 2011
Ganoderma polychromum2 August records since 2011- Pale Brittlestem Candolleomyces candolleanus2 August records since 2011
Plantpot Dapperling Leucocoprinus birnbaumii2 August records since 2011
Usually recorded in September here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii16 September records since 2011
- Red Cage Clathrus ruber11 September records since 2011
- Artist's Conk Ganoderma brownii4 September records since 2011
- Chip Cherries Leratiomyces ceres4 September records since 2011
Yellow Stainer Agaricus xanthodermus3 September records since 2011- False Parasol Chlorophyllum molybdites3 September records since 2011
- Amanita pruittii2 September records since 2011
- Yellow Fieldcap Bolbitius titubans2 September records since 2011
- Death Cap Amanita phalloides2 September records since 2011
California Agaricus Agaricus californicus2 September records since 2011- Golden Milk Cap Lactarius alnicola2 September records since 2011
Usually recorded in October here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii35 October records since 2011
- Red Cage Clathrus ruber20 October records since 2011
- Turkeytail Trametes versicolor5 October records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus3 October records since 2011
Liver Bolete Suillellus amygdalinus3 October records since 2011- Hebeloma limbatum2 October records since 2011
Leucocoprinus leucothites2 October records since 2011
Smoky Dapperling Leucoagaricus barssii2 October records since 2011
Brown Hay Cap Panaeolina foenisecii2 October records since 2011- Cabbage Parachute Gymnopus brassicolens2 October records since 2011
- Pale Brittlestem Candolleomyces candolleanus2 October records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus2 October records since 2011
Usually recorded in November here:
- Golden Milk Cap Lactarius alnicola19 November records since 2011
- Death Cap Amanita phalloides14 November records since 2011
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii14 November records since 2011
- Red Cage Clathrus ruber13 November records since 2011
- Mulch Maids Leratiomyces percevalii12 November records since 2011
- Chip Cherries Leratiomyces ceres9 November records since 2011
- Yellow Fieldcap Bolbitius titubans8 November records since 2011
- Yellow Stainer Agaricus xanthodermus8 November records since 2011
- Turkeytail Trametes versicolor8 November records since 2011
- Cabbage Parachute Gymnopus brassicolens7 November records since 2011
- Lawyer's Wig Coprinus comatus5 November records since 2011
Pungent Slippery Jack Suillus pungens4 November records since 2011
Usually recorded in December here:
- Death Cap Amanita phalloides39 December records since 2011
- Golden Milk Cap Lactarius alnicola34 December records since 2011
- Mulch Maids Leratiomyces percevalii21 December records since 2011
- Fly Agaric Amanita muscaria20 December records since 2011
Honey Fungus Armillaria mellea16 December records since 2011- Cabbage Parachute Gymnopus brassicolens15 December records since 2011
- Chip Cherries Leratiomyces ceres14 December records since 2011
- Hairy Curtain Crust Stereum hirsutum14 December records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus13 December records since 2011
- Wood Blewit Lepista nuda13 December records since 2011
- Liver Bolete Suillellus amygdalinus12 December records since 2011
- Lawyer's Wig Coprinus comatus11 December records since 2011
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 186 | |
| 2 | 161 | |
| 3 | 132 | |
| 4 | 119 | |
| 5 | 87 | |
| 6 | 84 | |
| 7 | 84 | |
| 8 | 83 | |
| 9 | 81 | |
| 10 | 81 | |
| 11 | 81 | |
| 12 | 75 | |
| 13 | 73 | |
| 14 | 71 | |
| 15 | 65 |
Being on this list doesn't mean a mushroom is common, easy to identify or safe. It only means it has been recorded here often.
Best months to look
Records by month, all years. Busiest: Aug, Jan, Dec.
Sightings map
● Each dot is a place with at least one record (rounded to about 1 km). Locations can be approximate, and many are on private land. Numbered blue circles are recent sightings, shown only to a general area of about 10 km.
Recent sightings
The 10 most recent dated records in this county, newest first. Data as of October 26, 2026. Records can take weeks or more to reach GBIF, so the newest finds may not show yet. Places are given only as a public park or forest (from the USGS Protected Areas Database) or the nearest town, and the numbered circles on the map cover a general area, not an exact spot.
- 1Sep 26, 2026Turkeytail Trametes versicolorin Augustin Bernal Park, CA · iNaturalist photo, research grade · original record
- 2Sep 26, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniiin Augustin Bernal Park, CA · iNaturalist photo, research grade · original record
- 3Sep 22, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Dublin, CA · iNaturalist photo, research grade · original record
- 4Sep 21, 2026Red Cage Clathrus rubernear Berkeley, CA · iNaturalist photo, research grade · original record
- 5Sep 20, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniiin Sycamore Grove Park, CA · iNaturalist photo, research grade · original record
- 6Sep 18, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Berkeley, CA · iNaturalist photo, research grade · original record
- 7Sep 18, 2026Chip Cherries Leratiomyces ceresnear Berkeley, CA · iNaturalist photo, research grade · original record
- 8Sep 1, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniiin Anthony Chabot Regional Park, CA · iNaturalist photo, research grade · original record
- 9Aug 15, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Oakland, CA · iNaturalist photo, research grade · original record
- 10Aug 3, 2026Red Cage Clathrus rubernear Berkeley, CA · iNaturalist photo, research grade · original record
Many sightings are on private land. Always get the landowner's permission, and follow the rules of parks and forests, which often limit or ban collecting.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.
How we built this page
6,967 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 4,658 CC0 and 2,309 CC BY 4.0. See about the data for the full citation.