Derby Fire
The Derby Fire burned 207,115 acres in Sweet Grass County, Montana, in 2006. It was discovered on August 22, 2006, and contained on October 19, 2006. The cause was recorded as natural.
- Size
- 207,115 acres
- Discovered
- August 22, 2006
- Contained
- October 19, 2006
- Cause
- Natural
Map
The burned area boundary MTBS mapped from Landsat imagery, 200,876 acres. Point of origin as reported, 45.536, -109.935.
The record
- Reported final size
- 207,115 acres
- Burned area mapped by MTBS
- 200,876 acres
- Area inside the final perimeter
- 207,431 acres
- Discovered
- August 22, 2006, 4:30 p.m. local time
- Contained
- October 19, 2006, 6:00 p.m. local time
- Cause
- Natural
- State
- Montana
- County
- Sweet Grass County
- Land ownership at origin
- Forest Service
- Reporting unit
- Custer Gallatin National Forest
- Agency
- Bureau of Land Management
- Unit
- MTNRC
- Incident type
- Wildfire
- MTBS fire identifier
- MT4559210981020060822
- MTBS assessment
- Extended
- Fire occurrence record
- FS-1441214
- Perimeter records
- 2 on file for this fire; the largest is shown
- Note on the perimeter
- Action Fire - BLM land protected by another Federal agency under co-op
The three sizes are three measurements: the size the agency reported when the fire was out, the burned area MTBS drew from satellite imagery before and after, and the GIS area inside the final perimeter, unburned islands included. They rarely agree exactly.
Other large fires in Montana in 200612
| Fire | Acres | Start | Cause |
|---|---|---|---|
| Canyon Creek Fire | 128,532 | ||
| Pine Ridge Complex | 121,687 | Jul 12, 2006 | Natural |
| Black Pulaski Fire | 117,292 | Jul 17, 2006 | Natural |
| Chippy Creek Fire | 98,980 | ||
| Bundy Railroad Fire | 91,897 | Jul 12, 2006 | Natural |
| Lost Creek (Black Pulaski Complex) Fire | 38,561 | Jul 17, 2006 | |
| Wyman #2 Fire | 35,482 | ||
| Red Eagle Fire | 34,203 | Jul 28, 2006 | Natural |
| Thompson Creek Fire | 33,653 | ||
| 8 Mile Saddle Fire | 25,926 | ||
| Jungle Fire | 25,828 | Aug 31, 2006 | Natural |
| Horton Fire | 25,239 | Jul 12, 2006 | Natural |
Nearby
Sources
Perimeters from the National Interagency Fire Center’s Interagency Fire Perimeter History, compiled from the Forest Service, BLM, BIA, Fish and Wildlife Service, National Park Service, the Alaska Interagency Fire Center and CAL FIRE. Burned areas and ignition dates from Monitoring Trends in Burn Severity (MTBS), a program of the US Geological Survey and the USDA Forest Service. Fire reports from Short, Karen C. 2022, Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014], 6th Edition, Forest Service Research Data Archive, doi.org/10.2737/RDS-2013-0009.6. Records before 2014 were joined by this site: a fire report to the burned area its MTBS identifier names, a perimeter to the burned area it lies in when the names or the sizes agree.