Mountain Satan's Bolete
Rubroboletus haematinus · Family Boletaceae · Updated October 2026
48US records
4states
Sepbusiest month
48 US records since 1887 (5 in the last 10 years)
Last seen Sep 25, 2026 (about 4 weeks ago) in Shasta National Forest, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Arizona and New Mexico, and the busiest months are Sep, Nov and Aug. (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: Sep, Nov, Aug.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 40 | Sep 25, 2026 |
| Arizona | 5 | Aug 16, 2026 |
| New Mexico | 2 | Aug 28, 1993 |
| New Jersey | 1 | 1887-08 |
Top counties
- Siskiyou County, CA (17) · latest Sep 25, 2026
- Sierra County, CA (12) · latest Sep 12, 1989
- Amador County, CA (3) · latest Sep 14, 1974
- Tuolumne County, CA (3) · latest Oct 16, 1982
- Coconino County, AZ (3) · latest Aug 16, 2026
- Fresno County, CA (2) · latest Sep 27, 1975
- Santa Cruz County, AZ (1) · latest Jul 24, 1980
- Pima County, AZ (1) · latest Aug 2, 1980
- Tehama County, CA (1) · latest Sep 29, 1989
- El Dorado County, CA (1) · latest Aug 10, 1974
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.