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Mushrooms in San Luis Obispo County, California
Updated October 2026 · from open GBIF records
916mushroom records
197species recorded
Janbusiest month
916 records since 1895 (856 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 olivascens16 January records since 2011
Golden Milk Cap Lactarius alnicola9 January records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis7 January records since 2011
Death Cap Amanita phalloides5 January records since 2011- Phlegmacium callimorphum4 January records since 2011
- Calonarius flavobulbus4 January records since 2011
Protected Ringless Amanita Amanita protecta4 January records since 2011
Candy Cap Lactarius rubidus4 January records since 2011
Western Jumbo Gym Gymnopilus ventricosus4 January records since 2011
Fly Agaric Amanita muscaria4 January records since 2011- Russula grundii3 January records since 2011
Pleated Marasmius Marasmius plicatulus3 January records since 2011
Usually recorded in February here:
- California Jack O' Lantern Omphalotus olivascens12 February records since 2011
Majestic Amanita Amanita augusta11 February records since 2011
Bittersweet Orange Ringless Amanita Amanita velosa8 February records since 2011
California Golden Chanterelle Cantharellus californicus6 February records since 2011
Western American Destroying Angel Amanita ocreata5 February records since 2011
Mulch Maids Leratiomyces percevalii5 February records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune5 February records since 2011
Wood Blewit Lepista nuda4 February records since 2011
Honey Fungus Armillaria mellea4 February records since 2011- Fly Agaric Amanita muscaria4 February records since 2011
Hairy Curtain Crust Stereum hirsutum4 February records since 2011- Western Jumbo Gym Gymnopilus ventricosus4 February records since 2011
Usually recorded in March here:
- Common Porecrust, Split Gill Fungus Schizophyllum commune10 March records since 2011
- California Golden Chanterelle Cantharellus californicus4 March records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa4 March records since 2011
- Mulch Maids Leratiomyces percevalii3 March records since 2011
Big Sheath Mushroom Volvopluteus gloiocephalus3 March records since 2011- Wood Blewit Lepista nuda3 March records since 2011
- California Jack O' Lantern Omphalotus olivascens3 March records since 2011
- Western American Destroying Angel Amanita ocreata3 March records since 2011
Oak-Loving Bolete Xerocomellus dryophilus3 March records since 2011
Black Witch's Butter Exidia glandulosa2 March records since 2011
Marasmius albogriseus2 March records since 2011- Hairy Curtain Crust Stereum hirsutum2 March records since 2011
Usually recorded in April here:
Desert Inkcap Montagnea arenaria6 April records since 2011- Bittersweet Orange Ringless Amanita Amanita velosa5 April records since 2011
Turkeytail Trametes versicolor4 April records since 2011
Blushing Bride Amanita novinupta2 April records since 2011
Usually recorded in May here:
- Desert Inkcap Montagnea arenaria5 May records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune3 May records since 2011
Usually recorded in June here:
- Turkeytail Trametes versicolor2 June records since 2011
- Death Cap Amanita phalloides2 June records since 2011
Usually recorded in July here:
Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 July records since 2011
Usually recorded in August here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 August records since 2011
Usually recorded in September here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii9 September records since 2011
Usually recorded in October here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii4 October records since 2011
Alice Eastwood's Bolete Rubroboletus eastwoodiae2 October records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune2 October records since 2011
Bearded Tooth Hericium erinaceus2 October records since 2011
Usually recorded in November here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii8 November records since 2011
- Honey Fungus Armillaria mellea3 November records since 2011
Barrow's Bolete Boletus barrowsii3 November records since 2011
Ballen's American Caesar Amanita calyptroderma3 November records since 2011- Golden Milk Cap Lactarius alnicola2 November records since 2011
- Protected Ringless Amanita Amanita protecta2 November records since 2011
- Death Cap Amanita phalloides2 November records since 2011
- Turkeytail Trametes versicolor2 November records since 2011
- California Jack O' Lantern Omphalotus olivascens2 November records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune2 November records since 2011
Usually recorded in December here:
- Fly Agaric Amanita muscaria12 December records since 2011
- California Jack O' Lantern Omphalotus olivascens7 December records since 2011
- California Golden Chanterelle Cantharellus californicus6 December records since 2011
- Western Jumbo Gym Gymnopilus ventricosus5 December records since 2011
- Turkeytail Trametes versicolor5 December records since 2011
- Golden Milk Cap Lactarius alnicola4 December records since 2011
Viscid Bolete Aureoboletus flaviporus3 December records since 2011
Cep Boletus edulis3 December records since 2011- Western Chicken-Of-The-Woods Laetiporus gilbertsonii3 December records since 2011
- Black Witch's Butter Exidia glandulosa3 December records since 2011
- Cryptomarasmius corbariensis3 December records since 2011
Poor Man's Slippery Jack Suillus fuscotomentosus3 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 | 40 | |
| 2 | 30 | |
| 3 | 29 | |
| 4 | 22 | |
| 5 | 20 | |
| 6 | 19 | |
| 7 | 19 | |
| 8 | 18 | |
| 9 | 14 | |
| 10 | 13 | |
| 11 | 13 | |
| 12 | 12 | |
| 13 | 12 | |
| 14 | 12 | |
| 15 | 11 |
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: Jan, Feb, 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 9 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 1, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Los Osos, CA · iNaturalist photo, research grade · original record
- 2Jun 3, 2026Death Cap Amanita phalloidesnear San Luis Obispo, CA · iNaturalist photo, research grade · original record
- 3Jun 3, 2026Death Cap Amanita phalloidesnear San Luis Obispo, CA · iNaturalist photo, research grade · original record
- 4May 14, 2026Bearded Tooth Hericium erinaceusnear Oak Shores, CA (location blurred by the observer) · iNaturalist photo, research grade · original record
- 5
May 1, 2026Western Giant Puffball Calvatia booniananear Los Osos, CA · iNaturalist photo, research grade · original record - 6
Apr 26, 2026Common Fieldcap Agrocybe pediadesin Montaña de Oro State Park, CA · iNaturalist photo, research grade · original record - 7Apr 19, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear San Luis Obispo, CA · iNaturalist photo, research grade · original record
- 8
Mar 21, 2026Gasteroid Agaricus Agaricus deserticolaon Bureau of Land Management land, CA · iNaturalist photo, research grade · original record - 9Mar 1, 2026Common Fieldcap Agrocybe pediadesnear Shandon, 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
916 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 307 CC0 and 609 CC BY 4.0. See about the data for the full citation.