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Wildfire perimeter

Helmet

Burned 40,201 acres (163 km², 62.8 mi²) in AK during 2017.

IRWIN {1E5D3F64-62ED-4… BLM AK fire history 2017 fires
Acres burned
40,201
163 km²
Year
2017
FIRE_YEAR field
State
AK
POOState region
Reporting agency
BLM
NIFC source
01 Perimeter shape

The fire's footprint

Simplified polygon (≤0.001° tolerance). 1 ring. Centroid 67.607°, -143.971°.

NW: 67.688°N, 144.139°W SE: 67.526°N, 143.803°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.