Burned 41,530 acres (168 km², 64.9 mi²) in AK during 1991.
Simplified polygon (≤0.001° tolerance). 6 rings. Centroid 65.621°, -149.404°.
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.