Hellroaring Fire
198877,539 acresMontana and Wyoming
The Hellroaring Fire burned 77,539 acres, about 121 square miles, across 2 counties. It began on August 15, 1988.
Watch how it happenedHellroaring Fire · 1988
How it happened
See how severely each place burned, revealed outward from where it started.
How severely it burned
Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.
| Severity | Share | Acres |
|---|---|---|
| Highmost vegetation consumed, soils altered | 23% | 17,560 |
| Moderatemixed: many trees killed, some survive | 19% | 14,639 |
| Lowsurface fire, most trees survive | 28% | 21,443 |
| Unburned to lowislands inside the perimeter, little change | 30% | 22,902 |
| Increased greennessvegetation greener after the fire than before | 1.2% | 905 |
| Not mappedcloud, shadow or water in the satellite images | 0.1% | 90 |
23% of the area inside the perimeter burned at high severity, about 17,560 acres; 42% 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.
| Park County | MT | 60,553 |
| Park County | WY | 17,044 |
Other large fires in Montana and Wyoming in 1988
- North Fork Fire563,089 acres
- Clovermist Fire303,221 acres
- Canyon Creek Fire167,806 acres
- Mink Fire135,337 acres
- Huck Fire123,340 acres
- Storm Creek Fire115,951 acres
- Brewer Fire48,246 acres
- Gates Park Fire42,484 acres
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.