Mushrooms in Summit County, Colorado
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.
Too few past records in February here to list species.
Too few past records in March here to list species.
Too few past records in April here to list species.
Usually recorded in May here:
Grey Puffball Bovista plumbea4 May records across all years
Field Earthstar Geastrum campestre2 May records across all years
Snowmelt Clitocybe Clitocybe glacialis2 May records across all years
Usually recorded in June here:
- Psathyrella atrifolia2 June records across all years
Usually recorded in July here:
Fly Agaric Amanita muscaria5 July records across all years
Ruby King Bolete Boletus rubriceps4 July records across all years
Melanoleuca angelesiana3 July records across all years
Calocybe naucoria2 July records across all years
Conifer Mazegill Gloeophyllum sepiarium2 July records across all years
Cannon Fungus Sphaerobolus stellatus2 July records across all years
Usually recorded in August here:
- Fly Agaric Amanita muscaria20 August records since 2011
- Conifer Mazegill Gloeophyllum sepiarium6 August records since 2011
Saffron Milk-Cap Lactarius deliciosus4 August records since 2011- Ruby King Bolete Boletus rubriceps4 August records since 2011
Rollrim Milkcap Lactarius resimus3 August records since 2011
Copper-Top Leccinum aurantiacum2 August records since 2011
Usually recorded in September here:
- Grey Puffball Bovista plumbea3 September records across all years
Hedgehog Fungus Hydnum repandum3 September records across all years- Agaricus alboumbonatus2 September records across all years
- Agaricus didymus2 September records across all years
Lactarius caespitosus2 September records across all years
Dwarf Bovist Lycoperdon dermoxanthum2 September records across all years
Agaricus amicosus2 September records across all years
Usually recorded in October here:
False Saffron Milkcap Lactarius deterrimus2 October records across all years
Umber-Brown Puffball Lycoperdon umbrinum2 October records across all years
Too few past records in November here to list species.
Too few past records in December here to list species.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 29 | |
| 2 | 20 | |
| 3 | 11 | |
| 4 | 8 | |
| 5 | 8 | |
| 6 | 7 | |
| 7 | 7 | |
| 8 | 6 | |
| 9 | 6 | |
| 10 | 5 | |
| 11 | 5 | |
| 12 | 5 | |
| 13 | 5 | |
| 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: Aug, Sep, Jul.
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.
- 1
Sep 20, 2026Sweetgrass Tooth Hydnellum suaveolensnear Silverthorne, CO · iNaturalist photo, research grade · original record - 2
Aug 3, 2026Shaggy Pholiota Pholiota squarrosanear Frisco, CO · iNaturalist photo, research grade · original record - 3Apr 25, 2026Tyromyces leucospongiusnear Silverthorne, CO · iNaturalist photo, research grade · original record
- 4
Jul 24, 2025Giant Lentinus Neolentinus ponderosusnear Keystone, CO · iNaturalist photo, research grade · original record - 5Oct 13, 2024Conifer Mazegill Gloeophyllum sepiariumnear Silverthorne, CO · iNaturalist photo, research grade · original record
- 6Sep 28, 2024Conifer Mazegill Gloeophyllum sepiariumin White River National Forest, CO · iNaturalist photo, research grade · original record
- 7
Sep 4, 2024Aspen Bracket Phellinus tremulaein White River National Forest, CO · iNaturalist photo, research grade · original record - 8Aug 20, 2024Fly Agaric Amanita muscariain White River National Forest, CO · iNaturalist photo, research grade · original record
- 9
Aug 19, 2024Scaly Knight Tricholoma vaccinumin White River National Forest, CO · iNaturalist photo, research grade · original record - 10
Aug 18, 2024Common Puffball Lycoperdon perlatumnear Breckenridge, CO · iNaturalist photo, research grade · original record
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How we built this page
949 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 867 CC0 and 82 CC BY 4.0. See about the data for the full citation.