Rocky Ridge Fire, Lusk, Wyoming

Green: vegetationBrown: already burnedOrange: fire right nowSentinel-2 · Copernicus

Key facts

Source: NIFC

Location17 miles southwest of Lusk, WY

CauseHuman

What's burningShort Grass (1 foot)

How it's behavingMinimalRunning — Runs along the ground much faster than a person walks.

ComplexityType 5 IncidentOfficial scale from 5 to 1: a Type 1 is the most complex in the country.

JurisdictionPrivate land

Cost so far$1,000

Glossary: what each term means

Minimal

Barely moving. Low, thin smoke.

Smoldering

Burning without flame, in the ground or in roots. Can flare up days later.

Creeping

Moves slowly, hugging the ground.

Moderate

Spreads with low, steady flames.

Active

Spreading evenly and steadily, with visible flame.

Extreme

Fast and unpredictable.

Running

Runs along the ground much faster than a person walks.

Flanking

Grows along the sides, not head-on.

Backing

Moves against the wind or downhill, which makes it slower.

Crowning

Climbs into the treetops and jumps crown to crown. It can't be attacked from the ground.

Short Crown Runs

Climbs into the crowns in bursts and drops back down.

Torching

Whole trees flaring up like torches.

Isolated Torching

Single scattered trees flaring up whole, like torches.

Group Torching

Whole clumps of trees flaring at once.

Spotting

Wind carries embers through the air and starts new fires ahead of the front: that is how a fire jumps a road or a firebreak.

Wind Driven Runs

The wind pushes it in long runs in one direction.

The ones marked ● are the behaviors that make a fire harder to stop. They are not a warning or an instruction: they are the description written by the agency in charge. For decisions, always follow your emergency services.

The story so far

Summary written on Aug 14, while the fire was still active. It has since ended — the figures above are current.

Burning across private land 17 miles southwest of Lusk in Goshen County, Wyoming, the Rocky Ridge Fire has burned 222 acres over 46 days of activity, averaging approximately 5 acres of growth per day. Fire behavior is currently minimal and running in short grass that stands about one foot tall. The human-caused blaze has reached 100 percent containment under the management of a Type 5 Incident Command and a Type 5 IC, utilizing a lean personnel crew of three workers. Total suppression costs have reached $1,000.

This incident unfolds during the region's typical fire season, which runs from June to October. On a broader scale, across the country, 2,902,022 hectares have burned so far in 2026, marking a figure that is 47% below the two-decade average.