Big Grass Fire

Perimeter mapped August 23, 2026 at 9:10 PM MDT, 575,163 acres (mixed methods). Point of origin 42.650, -117.303.

Live radar at the fire Forecast for Murphy

Size

578,637 acres

Containment

100%

Discovered

July 23, 2026 at 2:30 PM MDT

Contained

September 12, 2026 at 5:00 PM MDT

Cause

Natural

Location

25 Miles SW from JORDAN VALLEY, OR

County

Malheur County

State

Oregon

Nearest city reported

JORDAN VALLEY

Protecting agency

BLM

Jurisdiction

BLM

Land ownership at origin

BLM

Personnel assigned

124

Incident management

Type 3 IC, Type 1 Incident

Primary fuel

Short Grass (1 foot)

Estimated cost to date

$82,200,000

Incident type

Wildfire

Unique fire identifier

2026-ORVAD-260201

IRWIN identifier

6B0C72B3-0E12-4695-9022-E1113C0AA8D1

Mapped area at the last perimeter of each day, from July 24, 2026 (48,258 acres) to September 17, 2026 (575,163 acres). The largest one-day growth was 301,113 acres, mapped July 29, 2026.

This fire is no longer listed as current. The forecast for Murphy, ID covers the area today.

Posted on InciWeb, updated September 18, 2026.

The Big Grass Fire, located 25 miles southwest of Jordan Valley, Oregon, was reported on July 23, 2026, following a lightning strike. The Flint Fire, located 8 miles northwest of Triangle, Idaho, was reported on August 25, 2026, following a lightning strike. The Flint Fire is adjacent to the Big Grass Fire on the northeastern side. Fuels in the area consist of brush, short grasses, and tall grasses. The Big Grass Fire exhibited extreme fire behavior, with rapid rates of spread in all directions when smoke lifted and winds picked up in the afternoon. Numerous residential structures, outbuildings, and associated improvements were threatened. Additional values at risk include the Wild and Scenic River corridor, North Fork Campground, Three Forks Campground, priority sage-grouse habitat, essential pronghorn habitat, grazing allotments, a Remote Automated Weather Station (RAWS), the South Mountain communication site, and numerous mining operations farther north. Continued fire spread has the potential to impact residential properties, critical infrastructure, recreational facilities, wildlife habitat, rangeland resources, and fire weather monitoring capabilities. The Big Grass and Flint Fires are currently being managed by Southern Area Gray Team.

Original at InciWeb

• Murphy, ID55 miles northeast of the fire’s origin
• Marsing, ID67 miles north of the fire’s origin
• Homedale, ID69 miles north of the fire’s origin
• Nampa, ID72 miles northeast of the fire’s origin
• Kuna, ID73 miles northeast of the fire’s origin
• Wilder, ID74 miles north of the fire’s origin