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Mushrooms in Sierra County, California
Updated October 2026 · from open GBIF records
1,641mushroom records
390species recorded
Junbusiest month
1,641 records since 1928 (313 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.
Too few past records in January here to list species.
Usually recorded in February here:
- Hydnum melitosarx3 February records since 2011
Entoloma edulis2 February records since 2011
Too few past records in March here to list species.
Usually recorded in April here:
Cortinarius thiersii2 April records across all years- Psathyrella praetenuis2 April records across all years
Usually recorded in May here:
Lentinellus montanus3 May records across all years
Snowmelt Clitocybe Clitocybe glacialis3 May records across all years
Baker's Shanklet Collybia bakerensis3 May records across all years
Clitocybe albirhiza2 May records across all years
Hygrophorus subalpinus2 May records across all years
Wintergreen Snowmelt Pholiota Pholiota nubigena2 May records across all years
Ballen's Spring American Caesar Amanita vernicoccora2 May records across all years
Cryptic Globe Fungus Cryptoporus volvatus2 May records across all years
Usually recorded in June here:
Snowmelt Mycena Mycena nivicola9 June records since 2011
Mycena overholtsii8 June records since 2011- Snowmelt Clitocybe Clitocybe glacialis7 June records since 2011
Little Cone Bell Entoloma holoconiotum6 June records since 2011
Entoloma vernum6 June records since 2011- Cryptic Globe Fungus Cryptoporus volvatus6 June records since 2011
Melanoleuca angelesiana5 June records since 2011
Tricholoma moseri5 June records since 2011- Pholiota lignicola5 June records since 2011
- Wintergreen Snowmelt Pholiota Pholiota nubigena5 June records since 2011
Sculptured Puffball Calbovista subsculpta5 June records since 2011- Lentinellus montanus5 June records since 2011
Usually recorded in July here:
- Pholiota vernalis4 July records across all years
Mountain Butter Bolete Butyriboletus abieticola4 July records across all years- Cortinarius thiersii4 July records across all years
- Hygrophorus caeruleus3 July records across all years
- Baker's Shanklet Collybia bakerensis3 July records across all years
- Snowmelt Clitocybe Clitocybe glacialis3 July records across all years
Bear Lentinus Lentinellus ursinus2 July records across all years
Jewelled Amanita Amanita gemmata2 July records across all years
Purple-Red Hygrophorus Hygrophorus purpurascens2 July records across all years
Blue-Staining Slippery Jack Suillus tomentosus2 July records across all years
Calonarius verrucisporus2 July records across all years
Bay Polypore Picipes badius2 July records across all years
Usually recorded in August here:
Boletus subalpinus6 August records across all years
Royal Bolete Butyriboletus regius4 August records across all years- Blue-Staining Slippery Jack Suillus tomentosus4 August records across all years
Bittersweet Orange Ringless Amanita Amanita velosa3 August records across all years
Scrobiculate Milk Cap Lactarius scrobiculatus3 August records across all years- Boletus pinophilus3 August records across all years
- Mountain Butter Bolete Butyriboletus abieticola3 August records across all years
Gastroboletus turbinatus3 August records across all years
Melanoleuca graminicola2 August records across all years- Gastroboletus amyloideus2 August records across all years
Brownish Chroogomphus Chroogomphus rutilus2 August records across all years
Suillus punctatipes2 August records across all years
Usually recorded in September here:
- Blue-Staining Slippery Jack Suillus tomentosus21 September records across all years
- Gastroboletus turbinatus19 September records across all years
Slender Jack Suillus umbonatus18 September records across all years
Bitter Beech Bolete Caloboletus calopus17 September records across all years
Scaly Chanterelle Turbinellus floccosus16 September records across all years- Boletus subalpinus16 September records across all years
Aspen Bolete Leccinum insigne15 September records across all years- Scrobiculate Milk Cap Lactarius scrobiculatus15 September records across all years
- Suillus punctatipes14 September records across all years
Mountain Satan's Bolete Rubroboletus haematinus11 September records across all years
Short-Stalked Suillus Suillus brevipes11 September records across all years- Mountain Butter Bolete Butyriboletus abieticola10 September records across all years
Usually recorded in October here:
Herald Of Winter Hygrophorus hypothejus9 October records across all years- Boletus subalpinus7 October records across all years
Conifer Tuft Hypholoma capnoides6 October records across all years
Hygrophorus gliocyclus6 October records across all years- Scaly Chanterelle Turbinellus floccosus5 October records across all years
Red Cracking Bolete Xerocomellus chrysenteron5 October records across all years- Brownish Chroogomphus Chroogomphus rutilus5 October records across all years
Saffron Milk-Cap Lactarius deliciosus5 October records across all years
Gold Dust Waxy Cap Hygrophorus chrysodon4 October records across all years- Mycetinis applanatipes4 October records across all years
White Fibrecap Inocybe geophylla4 October records across all years- Hygrophorus fragrans4 October records across all years
Usually recorded in November here:
Giant Pine Spike Chroogomphus pseudovinicolor2 November records across all years
Ballen's American Caesar Amanita calyptroderma2 November records across all years
Too few past records in December here to list species.
⚠ 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 | 30 | |
| 2 | 29 | |
| 3 | 28 | |
| 4 | 26 | |
| 5 | 23 | |
| 6 | 23 | |
| 7 | 21 | |
| 8 | 21 | |
| 9 | 20 | |
| 10 | 19 | |
| 11 | 19 | |
| 12 | 18 | |
| 13 | 18 | |
| 14 | 18 | |
| 15 | 17 |
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: Jun, Sep, Oct.
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.
- 1May 30, 2026Sculptured Puffball Calbovista subsculptain Tahoe National Forest, CA · iNaturalist photo, research grade · original record
- 2May 28, 2026Pholiota lignicolain Tahoe National Forest, CA · iNaturalist photo, research grade · original record
- 3
Apr 25, 2026Pseudoomphalina angelesianain Tahoe National Forest, CA · iNaturalist photo, research grade · original record - 4Apr 25, 2026Little Cone Bell Entoloma holoconiotumin Tahoe National Forest, CA · iNaturalist photo, research grade · original record
- 5Apr 25, 2026Agaricus moroniiin Tahoe National Forest, CA · iNaturalist photo, research grade · original record
- 6
Apr 25, 2026Infundibulicybe squamulosain Tahoe National Forest, CA · iNaturalist photo, research grade · original record - 7Apr 25, 2026Cortinarius thiersiiin Tahoe National Forest, CA · iNaturalist photo, research grade · original record
- 8
Nov 20, 2025Death Cap Amanita phalloidesnear Goodyears Bar, CA · iNaturalist photo, research grade · original record - 9Nov 20, 2025Ballen's American Caesar Amanita calyptrodermanear Downieville, CA · iNaturalist photo, research grade · original record
- 10Aug 26, 2025Cryptic Globe Fungus Cryptoporus volvatusin Tahoe National Forest, 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
1,641 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 1,437 CC0 and 204 CC BY 4.0. See about the data for the full citation.