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Mushrooms in Colorado
Updated October 2026 · from open GBIF records
22,652mushroom records
25county pages
Augbusiest month
22,652 records since 1868 (3,984 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 in this state:
White Fibrecap Inocybe geophylla5 January records since 2011
Funnel Chanterelle Craterellus tubaeformis5 January records since 2011
Usually recorded in February in this state:
Corkstar Puffball Mycenastrum corium7 February records across all years
Usually recorded in March in this state:
Puffball Parasol Chlorophyllum agaricoides8 March records across all years
Usually recorded in April in this state:
- Disciseda subterranea9 April records across all years
Purple-Spored Puffball Calvatia cyathiformis8 April records across all years
Glistening Ink-Cap Coprinellus micaceus5 April records across all years- Corkstar Puffball Mycenastrum corium5 April records across all years
Usually recorded in May in this state:
Lawyer's Wig Coprinus comatus12 May records since 2011- Glistening Ink-Cap Coprinellus micaceus11 May records since 2011
Dryad's Saddle Cerioporus squamosus10 May records since 2011
Aspen Bracket Phellinus tremulae7 May records since 2011
Fairy Ring Champignon Marasmius oreades6 May records since 2011- Pholiota carbonaria5 May records since 2011
Spring Fieldcap Agrocybe praecox5 May records since 2011
Usually recorded in June in this state:
Fly Agaric Amanita muscaria8 June records since 2011
Mycena overholtsii7 June records since 2011
Cryptic Globe Fungus Cryptoporus volvatus6 June records since 2011- Fairy Ring Champignon Marasmius oreades6 June records since 2011
Snowmelt Clitocybe Clitocybe glacialis6 June records since 2011
Pale Oyster Pleurotus pulmonarius5 June records since 2011
Western Giant Puffball Calvatia booniana5 June records since 2011
Spring Polypore Lentinus arcularius5 June records since 2011
Usually recorded in July in this state:
- Fly Agaric Amanita muscaria66 July records since 2011
Ruby King Bolete Boletus rubriceps35 July records since 2011
Bicoloured Deceiver Laccaria bicolor12 July records since 2011
Laccaria nobilis7 July records since 2011
Burnt-Sugar Milky Lactarius helvus7 July records since 2011
Conifer Mazegill Gloeophyllum sepiarium7 July records since 2011
Scaly Tooth Sarcodon imbricatus7 July records since 2011
Crab Brittlegill Russula xerampelina7 July records since 2011
Usually recorded in August in this state:
- Fly Agaric Amanita muscaria124 August records since 2011
Short-Stalked Suillus Suillus brevipes89 August records since 2011
Blue-Staining Slippery Jack Suillus tomentosus70 August records since 2011
Saffron Milk-Cap Lactarius deliciosus52 August records since 2011- Ruby King Bolete Boletus rubriceps46 August records since 2011
- Scaly Tooth Sarcodon imbricatus43 August records since 2011
- Conifer Mazegill Gloeophyllum sepiarium37 August records since 2011
Common Puffball Lycoperdon perlatum33 August records since 2011
Usually recorded in September in this state:
Dune Stinkhorn Phallus hadriani11 September records since 2011- Conifer Mazegill Gloeophyllum sepiarium10 September records since 2011
- Lawyer's Wig Coprinus comatus10 September records since 2011
- Burnt-Sugar Milky Lactarius helvus8 September records since 2011
Armillaria solidipes7 September records since 2011- Short-Stalked Suillus Suillus brevipes7 September records since 2011
- Fly Agaric Amanita muscaria7 September records since 2011
- Western Giant Puffball Calvatia booniana6 September records since 2011
Usually recorded in October in this state:
Salty Mushroom Agaricus bernardii12 October records across all years- Lawyer's Wig Coprinus comatus11 October records across all years
Alcohol Inky Cap Coprinopsis atramentaria8 October records across all years
Field Mushroom Agaricus campestris7 October records across all years
Shaggy Parasol Chlorophyllum rhacodes7 October records across all years
Phellinus viticola6 October records across all years
Hairy Curtain Crust Stereum hirsutum5 October records across all years
Honey Fungus Armillaria mellea5 October records across all years
Usually recorded in November in this state:
- Cylindrobasidium corrugum7 November records across all years
Too few past records in December in this state 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.
Often-recorded species
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Ranked by how often each appears in county top-40 lists. This is a guide to what gets recorded, not to what is common or safe.
Best months to look
Records by month, all years. Busiest: Aug, Jul, Sep.
Counties
Counties with fewer than 100 records (34) are listed here without their own page.
| County | Records |
|---|---|
| Boulder County | 2,985 |
| Lake County | 2,569 |
| Chaffee County | 2,197 |
| Clear Creek County | 1,870 |
| Pitkin County | 1,774 |
| Grand County | 1,255 |
| Gilpin County | 1,196 |
| Larimer County | 991 |
| Denver County | 978 |
| Summit County | 949 |
| Jefferson County | 875 |
| Park County | 762 |
| Eagle County | 652 |
| San Miguel County | 538 |
| El Paso County | 424 |
| La Plata County | 386 |
| Gunnison County | 255 |
| Adams County | 173 |
| Teller County | 142 |
| Douglas County | 139 |
| San Juan County | 128 |
| Dolores County | 125 |
| Archuleta County | 122 |
| Saguache County | 107 |
| Routt County | 101 |
| Jackson County | 99 |
| Montezuma County | 95 |
| Arapahoe County | 89 |
| Mineral County | 75 |
| Hinsdale County | 65 |
| Custer County | 61 |
| Fremont County | 53 |
| Garfield County | 52 |
| Conejos County | 40 |
| Huerfano County | 40 |
| Ouray County | 37 |
| Weld County | 37 |
| Mesa County | 30 |
| Pueblo County | 27 |
| Delta County | 20 |
| Yuma County | 17 |
| Rio Blanco County | 16 |
| Las Animas County | 12 |
| Broomfield County | 12 |
| Montrose County | 11 |
| Elbert County | 10 |
| Washington County | 10 |
| Alamosa County | 10 |
| Moffat County | 8 |
| Morgan County | 7 |
| Prowers County | 4 |
| Rio Grande County | 4 |
| Costilla County | 4 |
| Bent County | 4 |
| Crowley County | 3 |
| Otero County | 3 |
| Baca County | 2 |
| Kiowa County | 1 |
| Cheyenne County | 1 |
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.