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Wildfire perimeter

Upper Willow

Burned 41,830 acres (169 km², 65.4 mi²) in the US during 2001.

IRWIN unkn-6000-355… USFS 2001 fires
Acres burned
41,830
169 km²
Year
2001
FIRE_YEAR field
State
—
POOState region
Reporting agency
USFS
NIFC source
01 Perimeter shape

The fire's footprint

Simplified polygon (≤0.001° tolerance). 1 ring. Centroid 41.700°, -117.639°.

NW: 41.803°N, 117.735°W SE: 41.598°N, 117.543°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.