Death Cap Mushrooms Found in Boise and Garden City
Local health officials warn residents to avoid wild mushrooms as deadly fungi are identified in the area.
Updated on Oct. 15, 2026 in Allergies
Live Poll
Do you feel confident identifying wild mushrooms in your local parks and trails?
Central District Health has issued a warning regarding the presence of poisonous death cap mushrooms in Boise and Garden City. While no poisonings have been reported, officials urge local residents to avoid foraging for wild mushrooms near oak and hardwood trees.
Why it matters
Death cap mushrooms are recognized as some of the deadliest in the world, and their toxins cannot be neutralized by cooking, freezing, or drying. This warning follows previous detections in the area, highlighting an ongoing risk for those who might mistakenly identify or consume wild specimens.
Central District Health issued a warning following the identification of death cap mushrooms in Boise and Garden City, noting the species was previously found in the city in 2022. There are currently no reported cases of mushroom poisoning related to these sightings.
The players
Central District Health
A public health agency serving the Boise area that monitors and reports on environmental health risks.
The details
Death cap mushrooms typically emerge during the fall following rain, often growing near oak and hardwood trees. Their toxins remain potent even if the mushrooms are cooked, dried, or frozen, making them impossible to render safe for consumption. After ingestion, symptoms including severe vomiting, abdominal pain, diarrhea, and dizziness usually begin within 6 to 24 hours, with severe liver and kidney damage potentially occurring 3 to 5 days later.
Timeline
2022: Death cap mushrooms were previously found in Boise.
6 to 24 hours after eating: Symptoms usually begin.
3 to 5 days later: Severe liver and kidney damage can follow.
Health Landscape
This warning updates the safety status of the region relative to the precedent set by the 2022 Boise death cap mushroom findings. These recurring sightings highlight the persistent challenge of managing wild, highly toxic fungi in urban environments during the fall season.
Residents should avoid foraging or consuming any wild mushrooms in Boise and Garden City to prevent accidental ingestion. If you suspect ingestion of a poisonous mushroom, seek immediate care and contact the poison center at 1-800-222-1222, or the ASPCA Animal Poison Control at 888-426-4435 if pets are involved.
The takeaway
Death cap mushrooms pose a lethal risk because their toxins survive any preparation method. If you believe someone has consumed a wild mushroom, do not wait for symptoms and contact the poison center at 1-800-222-1222 immediately.
Further reading
Learn more about identifying environmental hazards in your area by visiting Allergies.
Live Poll
Do you feel confident identifying wild mushrooms in your local parks and trails?
