The archived outline of the North Fire spans about 3.8 km from west to east and 7.3 km from south to north. CAL FIRE places the incident at off Interstate 15, south of Oaks Hills, in the Cajon Pass area. The mapped boundary provides a second way to locate the event: it shows the extent around that reference location.
| Start listed by CAL FIRE | 17 July 2015 |
|---|---|
| County listing | San Bernardino |
| Reported area in hectares | 1,720 ha (converted from acres) |
| Extent of the mapped outline | 3.8 × 7.3 km (west–east × south–north) |
| Containment entry in the archive | 21 July 2015 |
What the perimeter shows
The longer dimension runs north–south and is about 1.9 times the shorter one. A circular buffer drawn around the incident point would hide that difference. A road or settlement at the same distance from the point could fall inside or outside the mapped footprint depending on its direction.
Two estimates of area
The incident report gives 4,250 acres; the interagency feature stores 4,249.1 GIS acres. The mapped value is 0.9 acres below the reported value (0.02%). This compares two published measurements, not two observation times. The difference cannot be read as fire growth.
CAL FIRE also records structures damaged: 4; structures destroyed: 68. 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 Sand Fire of 2014 is the closest match by reported acreage in this 100-case collection (4,240 acres). Its mapped spans are 8.4 by 5.2 km, west–east then south–north, versus 3.8 by 7.3 km here. The longer axes run in different directions. Matching on acreage would miss that contrast.
Sources and map method
- North Fire · CAL FIRE incident record
- NIFC interagency history · source perimeter (GeoJSON)
- Sand 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.