The archived outline of the Buck Fire spans about 9.6 km from west to east and 9.2 km from south to north. CAL FIRE places the incident at Black Rock Mountain, North Portion of Yolla BollyWilderness. The mapped boundary provides a second way to locate the event: it shows the extent around that reference location.
| Start listed by CAL FIRE | 12 September 2017 |
|---|---|
| County listing | Trinity |
| Reported area in hectares | 5,430 ha (converted from acres) |
| Extent of the mapped outline | 9.6 × 9.2 km (west–east × south–north) |
| Containment entry in the archive | 9 January 2018 |
What the perimeter shows
The two spans differ by only 0.4 km. That does not make this a circular burn: the dimensions measure the outermost coordinates, leaving indentations and gaps invisible. Use the polygon itself, rather than its enclosing rectangle, to check whether a location intersects the footprint.
Two estimates of area
The incident report gives 13,417 acres; the interagency feature stores 13,357.3 GIS acres. The mapped value is 59.7 acres below the reported value (0.45%). This compares two published measurements, not two observation times. The difference cannot be read as fire growth.
A similar-sized fire for comparison
The Cranston Fire of 2018 is the closest match by reported acreage in this 100-case collection (13,139 acres). Its mapped spans are 12.1 by 10.2 km, west–east then south–north, versus 9.6 by 9.2 km here. The broad proportions are comparable. That does not establish that fuel, wind or suppression tactics were similar.
Sources and map method
- Buck Fire · CAL FIRE incident record
- NIFC interagency history · source perimeter (GeoJSON)
- Cranston Fire · comparison incident
- Comparison perimeter · interagency record
Spans use the geographic extremes of a generalized boundary, converted to kilometres at its middle latitude. They are approximate map dimensions, not distances travelled by flames. The GIS acreage is the source attribute, not an area recalculated from the simplified outline.