Home › California › Sonoma County
Mushrooms in Sonoma County, California
Updated October 2026 · from open GBIF records
5,990mushroom records
675species recorded
Decbusiest month
5,990 records since 1880 (5,433 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:
California Jack O' Lantern Omphalotus olivascens43 January records since 2011
Turkeytail Trametes versicolor41 January records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus36 January records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune30 January records since 2011
Hairy Curtain Crust Stereum hirsutum30 January records since 2011
Yellow Fieldcap Bolbitius titubans26 January records since 2011
Wood Blewit Lepista nuda24 January records since 2011
Galactic Milk Cap Lactarius xanthogalactus24 January records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis23 January records since 2011
Coral Tooth Hericium coralloides22 January records since 2011
Yellow-Gilled Gymnopilus Gymnopilus luteofolius19 January records since 2011
Golden Milk Cap Lactarius alnicola19 January records since 2011
Usually recorded in February here:
- Turkeytail Trametes versicolor27 February records since 2011
- Hairy Curtain Crust Stereum hirsutum18 February records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus17 February records since 2011
- California Jack O' Lantern Omphalotus olivascens15 February records since 2011
Bittersweet Orange Ringless Amanita Amanita velosa15 February records since 2011- Yellow Fieldcap Bolbitius titubans14 February records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune14 February records since 2011
Cat's Tongue Pseudohydnum gelatinosum14 February records since 2011
Mulch Maids Leratiomyces percevalii10 February records since 2011
Rosy Conk Rhodofomes cajanderi9 February records since 2011
Golden Bracket Fuscoporia gilva8 February records since 2011
Smoky Bracket Bjerkandera adusta8 February records since 2011
Usually recorded in March here:
- Turkeytail Trametes versicolor28 March records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus23 March records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune15 March records since 2011
- Hairy Curtain Crust Stereum hirsutum15 March records since 2011
Red Cage Clathrus ruber13 March records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus11 March records since 2011
Cryptic Globe Fungus Cryptoporus volvatus10 March records since 2011- Bittersweet Orange Ringless Amanita Amanita velosa10 March records since 2011
- Mulch Maids Leratiomyces percevalii8 March records since 2011
Cabbage Parachute Gymnopus brassicolens7 March records since 2011- Vitreoporus dichrous7 March records since 2011
- Golden Bracket Fuscoporia gilva7 March records since 2011
Usually recorded in April here:
- Turkeytail Trametes versicolor19 April records since 2011
- Red Cage Clathrus ruber10 April records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune9 April records since 2011
- Pseudobaeospora aphana7 April records since 2011
- Mulch Maids Leratiomyces percevalii6 April records since 2011
Lilac Oysterling Panus conchatus6 April records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus5 April records since 2011
Apricot Jelly Guepinia helvelloides5 April records since 2011
Pale Brittlestem Candolleomyces candolleanus4 April records since 2011- Hairy Curtain Crust Stereum hirsutum4 April records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa4 April records since 2011
- Hare'Sfoot Inkcap Coprinopsis lagopus3 April records since 2011
Usually recorded in May here:
- Common Porecrust, Split Gill Fungus Schizophyllum commune8 May records since 2011
- Turkeytail Trametes versicolor7 May records since 2011
Prince Agaricus augustus7 May records since 2011
Artist's Conk Ganoderma brownii5 May records since 2011
Glistening Ink-Cap Coprinellus micaceus5 May records since 2011- Red Cage Clathrus ruber5 May records since 2011
Death Cap Amanita phalloides4 May records since 2011- Mulch Maids Leratiomyces percevalii3 May records since 2011
Star-Capped Coprinus Coprinus calyptratus3 May records since 2011- Hairy Curtain Crust Stereum hirsutum2 May records since 2011
- Cryptic Globe Fungus Cryptoporus volvatus2 May records since 2011
Corn-Silk Fiberhead Pseudosperma sororium2 May records since 2011
Usually recorded in June here:
- Cryptic Globe Fungus Cryptoporus volvatus6 June records since 2011
- Prince Agaricus augustus4 June records since 2011
- Artist's Conk Ganoderma brownii3 June records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune3 June records since 2011
- Death Cap Amanita phalloides3 June records since 2011
Stuntz's Great Ringless Amanita Amanita pachycolea2 June records since 2011- Lilac Oysterling Panus conchatus2 June records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus2 June records since 2011
Usually recorded in July here:
- Artist's Conk Ganoderma brownii9 July records since 2011
- Prince Agaricus augustus5 July records since 2011
- Cryptic Globe Fungus Cryptoporus volvatus5 July records since 2011
Northern Red Belt Fomitopsis mounceae5 July records since 2011- Turkeytail Trametes versicolor4 July records since 2011
- Lilac Oysterling Panus conchatus2 July records since 2011
Usually recorded in August here:
- Prince Agaricus augustus3 August records across all years
Woolly Bird's Nest Fungus Nidula niveotomentosa2 August records across all years- Rosy Conk Rhodofomes cajanderi2 August records across all years
- Golden Bracket Fuscoporia gilva2 August records across all years
- Artist's Conk Ganoderma brownii2 August records across all years
Usually recorded in September here:
- Turkeytail Trametes versicolor4 September records across all years
Western Chicken-Of-The-Woods Laetiporus gilbertsonii4 September records across all years
Artist's Bracket Ganoderma applanatum2 September records across all years
West Coast Reishi Ganoderma oregonense2 September records across all years- Cryptic Globe Fungus Cryptoporus volvatus2 September records across all years
Usually recorded in October here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii18 October records since 2011
Majestic Amanita Amanita augusta13 October records since 2011
Ballen's American Caesar Amanita calyptroderma8 October records since 2011
Lawyer's Wig Coprinus comatus6 October records since 2011
Midnight Entoloma Entoloma medianox5 October records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune5 October records since 2011
- Artist's Conk Ganoderma brownii4 October records since 2011
Cep Boletus edulis4 October records since 2011- Turkeytail Trametes versicolor4 October records since 2011
Fly Agaric Amanita muscaria4 October records since 2011
Branched Shanklet Dendrocollybia racemosa3 October records since 2011
Bleeding Milk Cap Lactarius rubrilacteus3 October records since 2011
Usually recorded in November here:
- Fly Agaric Amanita muscaria34 November records since 2011
- California Jack O' Lantern Omphalotus olivascens19 November records since 2011
- Ballen's American Caesar Amanita calyptroderma19 November records since 2011
- Death Cap Amanita phalloides13 November records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus13 November records since 2011
- Yellow Fieldcap Bolbitius titubans12 November records since 2011
- Lawyer's Wig Coprinus comatus12 November records since 2011
Oak-Loving Bolete Xerocomellus dryophilus12 November records since 2011- Hairy Curtain Crust Stereum hirsutum11 November records since 2011
Liver Bolete Suillellus amygdalinus11 November records since 2011- Western Chicken-Of-The-Woods Laetiporus gilbertsonii11 November records since 2011
Common Collybia Gymnopus dryophilus10 November records since 2011
Usually recorded in December here:
- Fly Agaric Amanita muscaria79 December records since 2011
- Death Cap Amanita phalloides59 December records since 2011
- California Jack O' Lantern Omphalotus olivascens57 December records since 2011
- Hairy Curtain Crust Stereum hirsutum46 December records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus42 December records since 2011
- Turkeytail Trametes versicolor39 December records since 2011
- Golden Milk Cap Lactarius alnicola39 December records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune37 December records since 2011
- Galactic Milk Cap Lactarius xanthogalactus33 December records since 2011
Honey Fungus Armillaria mellea29 December records since 2011
Bonnets Mycena californiensis23 December records since 2011- Ballen's American Caesar Amanita calyptroderma23 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 | 142 | |
| 3 | 142 | |
| 4 | 140 | |
| 5 | 129 | |
| 6 | 129 | |
| 7 | 85 | |
| 8 | 80 | |
| 9 | 77 | |
| 10 | 68 | |
| 11 | 68 | |
| 12 | 65 | |
| 13 | 61 | |
| 14 | 60 | |
| 15 | 56 |
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: Dec, Jan, Nov.
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 27, 2026Turkeytail Trametes versicolornear Glen Ellen, CA · iNaturalist photo, research grade · original record
- 2
Sep 21, 2026Panaeolus antillarumnear Graton, CA · iNaturalist photo, research grade · original record - 3
Sep 20, 2026Snowy Inkcap Coprinopsis niveain Trione-Annadel State Park, CA · iNaturalist photo, research grade · original record - 4Sep 18, 2026Turkeytail Trametes versicolornear Sonoma, CA · iNaturalist photo, research grade · original record
- 5Aug 25, 2026Turkeytail Trametes versicolorin Salt Point State Park, CA · iNaturalist photo, research grade · original record
- 6
Aug 9, 2026Velvet Rollrim Tapinella atrotomentosain Salt Point State Park, CA · iNaturalist photo, research grade · original record - 7Jul 25, 2026Hairy Curtain Crust Stereum hirsutumin Fort Ross State Historic Park, CA · iNaturalist photo, research grade · original record
- 8
Jul 25, 2026Suede Bolete, Brown And Yellow Bolete, Boring Brown Bolete, Yellow-Cracked Bolete Xerocomus subtomentosusin Salt Point State Park, CA · iNaturalist photo, research grade · original record - 9
Jul 25, 2026Calcipostia guttulatain Salt Point State Park, CA · iNaturalist photo, research grade · original record - 10
Jul 16, 2026Leopard Earthball Scleroderma areolatumin Northwest Community Park, 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
5,990 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 892 CC0 and 5,098 CC BY 4.0. See about the data for the full citation.