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Largest fungus colony

The current largest fungus colony record is 3 sq mi, held by Honey fungus (Armillaria ostoyae). Last checked October 9, 2026.

3

sq mi

Honey fungus (Armillaria ostoyae)

Malheur National Forest, Oregon, USA

Holder: Honey fungus (Armillaria ostoyae)
Record: 3 sq mi
Metric: 9 km²
Exact figure: About 9 km2 (3.5 sq mi)
Location: Malheur National Forest, Oregon, USA
Last checked: October 9, 2026

Sources

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