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Wildfire perimeter

GRINDSTONE

Burned 39,806 acres (161 km², 62.2 mi²) in CA during 1922.

IRWIN unkn-40000-776… USFS CA fire history 1922 fires
Acres burned
39,806
161 km²
Year
1922
FIRE_YEAR field
State
CA
POOState region
Reporting agency
USFS
NIFC source
01 Perimeter shape

The fire's footprint

Simplified polygon (≤0.001° tolerance). 1 ring. Centroid 39.728°, -122.732°.

NW: 39.817°N, 122.815°W SE: 39.639°N, 122.648°W

About this perimeter

Sourced from the NIFC InterAgency Fire Perimeter History ArcGIS service. Polygon geometry has been simplified to ≤0.001° tolerance for storage; original full-fidelity perimeters are at fire.nifc.gov. We track all 75,044 documented historical perimeters; this detail view renders the top 1,000 by acreage. The shape above is rendered fully server-side with no JavaScript or external mapping library — it preserves the polygon's shape but not its precise geographic placement on a basemap.