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Mushrooms in Riverside County, California
Updated October 2026 · from open GBIF records
870mushroom records
197species recorded
Marbusiest month
870 records since 1889 (518 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:
Desert Shaggymane Podaxis pistillaris5 January records since 2011
California Jack O' Lantern Omphalotus olivascens3 January records since 2011
Clay-Gilled Milkcap Lactarius argillaceifolius2 January records since 2011
Common Collybia Gymnopus dryophilus2 January records since 2011- Psathyrella longicauda2 January records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis2 January records since 2011
Pholiota foedata2 January records since 2011
Usually recorded in February here:
Cultivated Mushroom Agaricus bisporus46 February records across all years
Desert Inkcap Montagnea arenaria5 February records across all years- Desert Shaggymane Podaxis pistillaris3 February records across all years
- Lepiota neophana2 February records across all years
Western American False Panther Amanita pantherinoides2 February records across all years
Turkeytail Trametes versicolor2 February records across all years
Usually recorded in March here:
- Desert Shaggymane Podaxis pistillaris6 March records since 2011
- Tylopilus humilis3 March records since 2011
- Desert Inkcap Montagnea arenaria3 March records since 2011
Candlestick Amanita Amanita calyptratoides2 March records since 2011- Galerina nigripes2 March records since 2011
Coral Tooth Hericium coralloides2 March records since 2011- Parasola megasperma2 March records since 2011
Wood Blewit Lepista nuda2 March records since 2011
Gasteroid Agaricus Agaricus deserticola2 March records since 2011
Usually recorded in April here:
- Cultivated Mushroom Agaricus bisporus21 April records across all years
- Desert Inkcap Montagnea arenaria5 April records across all years
Inonotus munzii4 April records across all years- Desert Shaggymane Podaxis pistillaris4 April records across all years
- Phanerochaete alnea3 April records across all years
Big Sheath Mushroom Volvopluteus gloiocephalus3 April records across all years
Inocutis dryophila2 April records across all years- Gyrophragmium inquinans2 April records across all years
Usually recorded in May here:
Bittersweet Orange Ringless Amanita Amanita velosa3 May records since 2011- Gasteroid Agaricus Agaricus deserticola3 May records since 2011
Cryptic Globe Fungus Cryptoporus volvatus3 May records since 2011
Willow Deceiver Laccaria pumila2 May records since 2011
Nitrous Bonnet Mycena leptocephala2 May records since 2011- Desert Shaggymane Podaxis pistillaris2 May records since 2011
Milky Conecap Conocybe apala2 May records since 2011
Usually recorded in June here:
Snowmelt Clitocybe Clitocybe glacialis2 June records since 2011- Cortinarius brunneovernus2 June records since 2011
- Cortinarius subexitiosus2 June records since 2011
False Parasol Chlorophyllum molybdites2 June records since 2011- Cryptic Globe Fungus Cryptoporus volvatus2 June records since 2011
Usually recorded in July here:
Giant Lentinus Neolentinus ponderosus7 July records across all years
Dune Stinkhorn Phallus hadriani3 July records across all years- Cryptic Globe Fungus Cryptoporus volvatus3 July records across all years
- Inocutis dryophila2 July records across all years
- False Parasol Chlorophyllum molybdites2 July records across all years
Usually recorded in August here:
- Desert Shaggymane Podaxis pistillaris2 August records across all years
- False Parasol Chlorophyllum molybdites2 August records across all years
Usually recorded in September here:
- Inonotus munzii5 September records across all years
Western Chicken-Of-The-Woods Laetiporus gilbertsonii4 September records across all years- Desert Shaggymane Podaxis pistillaris3 September records across all years
- Desert Inkcap Montagnea arenaria3 September records across all years
Frothy Porecrust Irpex latemarginatus2 September records across all years- False Parasol Chlorophyllum molybdites2 September records across all years
Usually recorded in October here:
- Desert Shaggymane Podaxis pistillaris8 October records since 2011
- False Parasol Chlorophyllum molybdites7 October records since 2011
- Desert Inkcap Montagnea arenaria2 October records since 2011
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 October records since 2011
Usually recorded in November here:
- Desert Shaggymane Podaxis pistillaris6 November records since 2011
- Desert Inkcap Montagnea arenaria5 November records since 2011
Porotheleum fimbriatum2 November records since 2011
Common Fieldcap Agrocybe pediades2 November records since 2011- Western Chicken-Of-The-Woods Laetiporus gilbertsonii2 November records since 2011
- California Jack O' Lantern Omphalotus olivascens2 November records since 2011
Usually recorded in December here:
- Desert Shaggymane Podaxis pistillaris11 December records across all years
- Desert Inkcap Montagnea arenaria3 December records across all years
- Hypholoma californicum2 December records across all years
- California Jack O' Lantern Omphalotus olivascens2 December records across all years
⚠ 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 | 154 | |
| 2 | 62 | |
| 3 | 34 | |
| 4 | 18 | |
| 5 | 13 | |
| 6 | 12 | |
| 7 | 10 | |
| 8 | 10 | |
| 9 | 9 | |
| 10 | 7 | |
| 11 | 5 | |
| 12 | 5 | |
| 13 | Fibricium rude | 4 |
| 14 | 4 | |
| 15 | 4 |
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: Mar, Feb, Jan.
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 9, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear Idyllwild-Pine Cove, CA · iNaturalist photo, research grade · original record
- 2
Sep 5, 2026Plantpot Dapperling Leucocoprinus birnbaumiinear Riverside, CA · iNaturalist photo, research grade · original record - 3
Aug 27, 2026Brown Cubical Rot Laetiporus conifericolain Idyllwild Park, CA · iNaturalist photo, research grade · original record - 4Aug 3, 2026False Parasol Chlorophyllum molybditesin Fairmount Park, CA · iNaturalist photo, research grade · original record
- 5Jul 11, 2026Giant Lentinus Neolentinus ponderosusnear Idyllwild-Pine Cove, CA · iNaturalist photo, research grade · original record
- 6
May 30, 2026Peeling Puffball Lycoperdon marginatumin San Bernardino National Forest, CA · iNaturalist photo, research grade · original record - 7
Mar 24, 2026Hairy Curtain Crust Stereum hirsutumin San Bernardino National Forest, CA · iNaturalist photo, research grade · original record - 8Mar 7, 2026Desert Inkcap Montagnea arenarianear Sky Valley, CA · iNaturalist photo, research grade · original record
- 9Mar 2, 2026Desert Shaggymane Podaxis pistillarisin Riverside County, CA · iNaturalist photo, research grade · original record
- 10Feb 6, 2026Desert Inkcap Montagnea arenarianear Sky Valley, 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
870 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 396 CC0 and 474 CC BY 4.0. See about the data for the full citation.