The archived outline of the Mountain Fire spans about 17.0 km from west to east and 15.7 km from south to north. CAL FIRE places the incident at Hwy 243 & Hwy 74 near Mountain Center. The mapped boundary provides a second way to locate the event: it shows the extent around that reference location.
| Start listed by CAL FIRE | 15 July 2013 |
|---|---|
| County listing | Riverside |
| Reported area in hectares | 11,141 ha (converted from acres) |
| Extent of the mapped outline | 17.0 × 15.7 km (west–east × south–north) |
| Containment entry in the archive | 30 July 2013 |
What the perimeter shows
The two spans differ by only 1.3 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 27,531 acres; the interagency feature stores 27,523.7 GIS acres. The mapped value is 7.3 acres below the reported value (0.03%). This compares two published measurements, not two observation times. The difference cannot be read as fire growth.
CAL FIRE also records structures damaged: 1; structures destroyed: 23. Those counts come from the incident record. A building inside the perimeter cannot be assigned a damage category from this map alone.
A similar-sized fire for comparison
The American Fire of 2013 is the closest match by reported acreage in this 100-case collection (27,440 acres). Its mapped spans are 14.8 by 14.2 km, west–east then south–north, versus 17.0 by 15.7 km here. The broad proportions are comparable. That does not establish that fuel, wind or suppression tactics were similar.
Sources and map method
- Mountain Fire · CAL FIRE incident record
- NIFC interagency history · source perimeter (GeoJSON)
- American 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.