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Mushrooms in King County, Washington
Updated October 2026 · from open GBIF records
9,788mushroom records
1,393species recorded
Octbusiest month
9,788 records since 1873 (1,341 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:
Hair Ice Crust Exidiopsis effusa20 January records since 2011
Late Fall Oyster Mushroom Sarcomyxa serotina10 January records since 2011
Turkeytail Trametes versicolor10 January records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune9 January records since 2011
Hairy Curtain Crust Stereum hirsutum3 January records since 2011
Wood Blewit Lepista nuda3 January records since 2011
Spreading Phlebia Phlebia radiata3 January records since 2011
Questionable Stropharia Stropharia ambigua3 January records since 2011
Rosy Conk Rhodofomes cajanderi3 January records since 2011
Small Moss Oysterling Arrhenia retiruga2 January records since 2011
Common Bird's Nest Crucibulum laeve2 January records since 2011
Sulphur Tuft Hypholoma fasciculare2 January records since 2011
Usually recorded in February here:
- Turkeytail Trametes versicolor13 February records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune8 February records since 2011
Northern Red Belt Fomitopsis mounceae7 February records since 2011- Hair Ice Crust Exidiopsis effusa4 February records since 2011
Lumpy Bracket Trametes gibbosa3 February records since 2011
Golden Waxy Cap Hygrocybe flavescens3 February records since 2011
Fluted Bird's Nest Cyathus striatus3 February records since 2011
Conifer Mazegill Gloeophyllum sepiarium2 February records since 2011
Lichenomphalia ericetorum2 February records since 2011
Crowded Cuplet Merismodes fasciculata2 February records since 2011
Usually recorded in March here:
- Turkeytail Trametes versicolor12 March records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune8 March records since 2011
- Northern Red Belt Fomitopsis mounceae4 March records since 2011
- Lichenomphalia ericetorum3 March records since 2011
Smoky Bracket Bjerkandera adusta2 March records since 2011- Questionable Stropharia Stropharia ambigua2 March records since 2011
Lawyer's Wig Coprinus comatus2 March records since 2011
Silky Pinkgill Entoloma sericeum2 March records since 2011- Lumpy Bracket Trametes gibbosa2 March records since 2011
Usually recorded in April here:
- Turkeytail Trametes versicolor15 April records since 2011
Glistening Ink-Cap Coprinellus micaceus10 April records since 2011
Spring Fieldcap Agrocybe praecox5 April records since 2011- Lichenomphalia ericetorum5 April records since 2011
Pale Oyster Pleurotus pulmonarius5 April records since 2011
Western American False Panther Amanita pantherinoides5 April records since 2011
Chip Cherries Leratiomyces ceres4 April records since 2011
Oyster Mushroom Pleurotus ostreatus4 April records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune3 April records since 2011
- Northern Red Belt Fomitopsis mounceae3 April records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus2 April records since 2011
Jellied Bird's Nest Fungus Nidula candida2 April records since 2011
Usually recorded in May here:
- Turkeytail Trametes versicolor21 May records since 2011
Artist's Bracket Ganoderma applanatum12 May records since 2011- Spring Fieldcap Agrocybe praecox9 May records since 2011
- Northern Red Belt Fomitopsis mounceae7 May records since 2011
- Pale Oyster Pleurotus pulmonarius5 May records since 2011
- Lawyer's Wig Coprinus comatus5 May records since 2011
- Oyster Mushroom Pleurotus ostreatus5 May records since 2011
- Chip Cherries Leratiomyces ceres5 May records since 2011
- Western American False Panther Amanita pantherinoides4 May records since 2011
Pleated Inkcap Parasola plicatilis3 May records since 2011- Glistening Ink-Cap Coprinellus micaceus3 May records since 2011
Mulch Maids Leratiomyces percevalii2 May records since 2011
Usually recorded in June here:
Prince Agaricus augustus6 June records since 2011- Northern Red Belt Fomitopsis mounceae4 June records since 2011
- Artist's Bracket Ganoderma applanatum4 June records since 2011
- Turkeytail Trametes versicolor3 June records since 2011
- Pale Oyster Pleurotus pulmonarius2 June records since 2011
California Flat-Top Agaricus Agaricus deardorffensis2 June records since 2011
Usually recorded in July here:
- Prince Agaricus augustus7 July records since 2011
- Northern Red Belt Fomitopsis mounceae5 July records since 2011
- Fluted Bird's Nest Cyathus striatus2 July records since 2011
- Artist's Bracket Ganoderma applanatum2 July records since 2011
- Lumpy Bracket Trametes gibbosa2 July records since 2011
Usually recorded in August here:
- Northern Red Belt Fomitopsis mounceae7 August records since 2011
- Turkeytail Trametes versicolor3 August records since 2011
Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 August records since 2011
Velvet Rollrim Tapinella atrotomentosa2 August records since 2011
Dark Bitter Bolete Caloboletus conifericola2 August records since 2011
Smith's Bolete Boletus smithii2 August records since 2011- Fluted Bird's Nest Cyathus striatus2 August records since 2011
Usually recorded in September here:
Brown Cubical Rot Laetiporus conifericola11 September records since 2011- Turkeytail Trametes versicolor6 September records since 2011
Fly Agaric Amanita muscaria6 September records since 2011
Jelly Rot Phlebia tremellosa6 September records since 2011
Conifer Parasol Chlorophyllum olivieri4 September records since 2011
Western Cauliflower Mushroom Sparassis radicata4 September records since 2011
Common Puffball Lycoperdon perlatum4 September records since 2011
Onion-Stalk Parasol Leucocoprinus cepistipes4 September records since 2011
Admirable Bolete Aureoboletus mirabilis4 September records since 2011- Spreading Phlebia Phlebia radiata4 September records since 2011
Scaly Chanterelle Turbinellus floccosus3 September records since 2011
Skullcap Dapperling Leucocoprinus brebissonii3 September records since 2011
Usually recorded in October here:
- Fly Agaric Amanita muscaria42 October records since 2011
Fir-Cone Mushroom Strobilurus trullisatus14 October records since 2011- Chip Cherries Leratiomyces ceres13 October records since 2011
- Spreading Phlebia Phlebia radiata11 October records since 2011
- Lawyer's Wig Coprinus comatus10 October records since 2011
- Turkeytail Trametes versicolor10 October records since 2011
- Jelly Rot Phlebia tremellosa10 October records since 2011
Violet Webcap Cortinarius violaceus8 October records since 2011
Bleeding Fairy Helmet Mycena haematopus8 October records since 2011- Questionable Stropharia Stropharia ambigua7 October records since 2011
- Fluted Bird's Nest Cyathus striatus7 October records since 2011
- Northern Red Belt Fomitopsis mounceae6 October records since 2011
Usually recorded in November here:
- Fly Agaric Amanita muscaria55 November records since 2011
- Questionable Stropharia Stropharia ambigua16 November records since 2011
- Late Fall Oyster Mushroom Sarcomyxa serotina8 November records since 2011
- Lawyer's Wig Coprinus comatus8 November records since 2011
- Turkeytail Trametes versicolor7 November records since 2011
- Northern Red Belt Fomitopsis mounceae7 November records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis7 November records since 2011
Orange Chrysomphalina Chrysomphalina aurantiaca6 November records since 2011
Deadly Galerina Galerina marginata6 November records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune5 November records since 2011
Cat's Tongue Pseudohydnum gelatinosum5 November records since 2011- Glistening Ink-Cap Coprinellus micaceus4 November records since 2011
Usually recorded in December here:
- Hair Ice Crust Exidiopsis effusa14 December records since 2011
- Late Fall Oyster Mushroom Sarcomyxa serotina9 December records since 2011
- Turkeytail Trametes versicolor8 December records since 2011
Marasmiellus candidus6 December records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune5 December records since 2011
Crystal Brain Fungus Myxarium nucleatum4 December records since 2011
Woolly Bird's Nest Fungus Nidula niveotomentosa4 December records since 2011- Fly Agaric Amanita muscaria4 December records since 2011
Silver Leaf Disease Chondrostereum purpureum3 December records since 2011
Bark Bonnet Phloeomana speirea3 December records since 2011- Cat's Tongue Pseudohydnum gelatinosum3 December records since 2011
Panellus longinquus3 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 | 127 | |
| 2 | 119 | |
| 3 | 59 | |
| 4 | 56 | |
| 5 | 55 | |
| 6 | 54 | |
| 7 | 45 | |
| 8 | 42 | |
| 9 | 40 | |
| 10 | 38 | |
| 11 | 37 | |
| 12 | 36 | |
| 13 | 33 | |
| 14 | 33 | |
| 15 | 32 |
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: Oct, Nov, Sep.
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.
- 1Oct 5, 2026Fly Agaric Amanita muscariain Cougar Mountain Regional Wildland Park, WA · iNaturalist photo, research grade · original record
- 2Oct 3, 2026Fly Agaric Amanita muscariain Montlake Cut South, WA · iNaturalist photo, research grade · original record
- 3Oct 3, 2026Jelly Rot Phlebia tremellosain Seward Park, WA · iNaturalist photo, research grade · original record
- 4Oct 2, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Seattle, WA · iNaturalist photo, research grade · original record
- 5Sep 26, 2026Spreading Phlebia Phlebia radiatain West Tiger Mountain Natural Resources Conservation Area, WA · iNaturalist photo, research grade · original record
- 6Sep 26, 2026Fly Agaric Amanita muscarianear Lake Forest Park, WA · iNaturalist photo, research grade · original record
- 7Sep 23, 2026Fly Agaric Amanita muscarianear Seattle, WA · iNaturalist photo, research grade · original record
- 8Sep 19, 2026Spreading Phlebia Phlebia radiatanear Lake Forest Park, WA · iNaturalist photo, research grade · original record
- 9Sep 19, 2026Conifer Parasol Chlorophyllum olivierinear Issaquah, WA · iNaturalist photo, research grade · original record
- 10Sep 15, 2026Common Porecrust, Split Gill Fungus Schizophyllum communein Wilson Playfields, WA · 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
9,788 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 8,580 CC0 and 1,208 CC BY 4.0. See about the data for the full citation.