Fridley Fire

200127,549 acresMontana

The Fridley Fire burned 27,549 acres, about 43 square miles, across Park County. It began on August 19, 2001.

Watch how it happened

Fridley Fire · 2001

How it happened

Watch it burn in the order satellites saw it, coloured by how severely each place burned.

About this replay
Date (UTC)—Historical replay
Burned so far—acres
High severity—of the area so far
Detections120satellite fire pixels

How severely it burned

Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.

Map of burn severity across the Fridley Fire
Burn severity by class
SeverityShareAcres
Highmost vegetation consumed, soils altered56%15,538
Moderatemixed: many trees killed, some survive15%4,098
Lowsurface fire, most trees survive11%3,081
Unburned to lowislands inside the perimeter, little change15%4,148
Increased greennessvegetation greener after the fire than before0.4%98
Not mappedcloud, shadow or water in the satellite images2.1%586

56% of the area inside the perimeter burned at high severity, about 15,538 acres; 71% burned at moderate or high severity.

Monitoring Trends in Burn Severity (U.S. Geological Survey and USDA Forest Service). Classes come from the change in a Landsat burn index (dNBR) between images before and after the fire; acres are each class’s share of the fire’s mapped area.

Where it burned

Acres inside each county, measured from the satellite-mapped perimeter.

Acres burned by county
Park CountyMT27,574

Other large fires in Montana in 2001

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.