Lactarius montanus
Family Russulaceae · Updated October 2026
36US records
6states
Augbusiest month
36 US records since 1948 (13 in the last 10 years)
Last seen Sep 20, 2026 (about 5 weeks ago) near Forest Lakes, Gila County, AZ, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Colorado, Arizona and California, and the busiest months are Aug, Sep and Oct. (Data as of October 26, 2026; records can lag by weeks.)
⚠ 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.
Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.
When it's recorded
Records by month, all years. Busiest: Aug, Sep, Oct.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| Colorado | 25 | Aug 12, 2023 |
| Arizona | 7 | Sep 20, 2026 |
| California | 1 | Oct 26, 1975 |
| Utah | 1 | Sep 13, 1969 |
| Alaska | 1 | – |
| Washington | 1 | Sep 3, 1948 |
Top counties
- Boulder County, CO (7) · latest Aug 12, 2023
- Coconino County, AZ (5) · latest Aug 29, 1971
- Clear Creek County, CO (5) · latest Aug 19, 2020
- Larimer County, CO (5) · latest Aug 24, 2012
- Gilpin County, CO (2) · latest Aug 15, 1974
- Grand County, CO (2) · latest Aug 13, 2021
- Nevada County, CA (1) · latest Oct 26, 1975
- San Juan County, UT (1) · latest Sep 13, 1969
- Chaffee County, CO (1) · latest Jul 25, 1970
- Cochise County, AZ (1) · latest Aug 31, 1991
More on this species from GBIF.
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.