East Troublesome Fire grows to 170,000 acres

Becomes the second largest fire in Colorado’s history

Updated October 23, 2020   |   7:54 a.m. MDT

In a briefing Thursday evening the Incident Commander of the Type 1 Incident Management Team, Noel Livingston, said the 50,000 acres of additional growth of the East Troublesome Fire brought the size up to 170,000 acres.

He  confirmed that a spot fire crossed the Continental Divide and became established on the east side of Rocky Mountain National Park on the northwest side of Mt. Wuh. The spot fire stopped spreading when the temperature dropped to 30 degrees and the relative humidity increased to 89 percent as moisture came in from the east with a change in wind direction. The limited mapping that was done around and through clouds Thursday night showed that it had burned about 1,400 acres. Firefighting resources from the Cameron Fire to the north are assisting with this spot fire which is about 7 miles west of Estes Park.

To see all articles on Wildfire Today about the East Troublesome Fire, including the most recent, click here.

Grand County Sheriff Brett Schroetlin, who called the fire the “worst of the worst,” said Thursday morning there was “lots of structure loss,” but didn’t have details on how many had burned.

You can zoom in on the map above. The red line is the approximate perimeter of the East Troublesome Fire at 8:30 p.m. MDT October 22, 2020. However clouds over most of the fire partially blocked the view from the fixed wing aircraft that was mapping the fire. The white line was the perimeter at 12:30 a.m. MDT October 22, 2020. The red shaded areas represent intense heat, some of which is shown outside the perimeter line where clouds made it difficult to determine the perimeter.


Updated October 22, 2020   |   6:30 p.m. MDT

East Troublesome Fire map
East Troublesome Fire 2 p.m. MDT Oct. 22, 2020.

After reports of the East Troublesome Fire crossing the Continental Divide into the east side of Rocky Mountain National Park causing the evacuation of much of Estes Park, the community caught a break, however temporary it may be.

Paul Werth, Fire Weather Meteorologist, explained it in a comment below this article:

Good news for Estes Park! The first in a series of cold fronts has moved into the Estes Park area. Within the past few hours, the temperature at the Estes Park RAWS(NPS) has dropped to 30 degrees and the RH has jumped to 89%. The winds have also shifted from the SW gusting to 30 mph to an easterly direction of 10 mph or less. Weather stations a few miles to the west of Estes Park (elevation 8900 ft msl) also show cold temperatures and high RH with easterly winds. The high RH should moisten the 1 and 10-hr fuels to significantly diminish the threat of the fire moving into Estes Park.

The satellite overflight at 2 p.m. Thursday did not detect any large heat sources east of the Continental Divide. This could be due to low clouds  which blocked detection by the satellite’s sensors. Park employees were heard on the radio Thursday talking about smoke that was mixed with fog, and the GOES 16 satellite showed what appeared to be low clouds or fog east of the Divide, while smoke from the main fire to the west was blowing to the east over the clouds.

Alpine Visitor Center in Rocky Mountain National Park
View from the Alpine Visitor Center in Rocky Mountain National Park at 5:18 p.m. MDT Oct. 22, 2020.

While there is a reduction in the fire activity east of the Divide, the rest of the fire was still active at 2 p.m. Thursday. In the Grand Lake area the wind shifted from coming out of the southwest, to coming from the south and south-southeast from 1 p.m. until 9 a.m. This allowed the activity on the north side to increase. As of 2 p.m. the fire had pushed to the north for about three miles to Parkview Mountain west of Highway 125. (see the map above)

The more moderate conditions in the Estes Park area are expected to last until Friday evening. There is even a 56 percent chance of precipitation in the area Thursday night. It could be back to the races again after 11 p.m. Friday with strong 17 mph winds out of the west gusting to 28 on Saturday, with the humidity in the 20s. Rain changing to snow is expected beginning Saturday evening.

West of the Continental Divide the winds will be moderate until picking up Friday afternoon, then becoming stronger Saturday — 20 mph out of the west gusting above 30 with the humidity in the 20s.


Updated October 22, 2020   |   2:44 p.m MDT

map east side of the East Troublesome Fire
3-D map showing the east side of the East Troublesome Fire with the spread across the Continental Divide. Looking northwest.
East Troublesome Fire satellite photo
The East Troublesome Fire as seen by the GOES 16 satellite at 2:26 p.m. MDT Oct. 22, 2020. Detections of heat have been enhanced.

Updated October 22, 2020   |   1:06 p.m. MDT

There are unofficial reports from individuals monitoring radio traffic that the East Troublesome Fire running to the east has jumped across the Continental Divide in Rocky Mountain National Park, which is 10,000 to 12,000 feet above sea level. Two of the locations that reportedly have fire is Bear Lake seven miles southwest of the town of Estes Park, and Forest Canyon which is west of Moraine Park.

Map East Troublesome Fire
Map of the east side of the East Troublesome Fire indicating the direction of spread. The red line was the perimeter observed during a mapping flight at 12:30 a.m. MDT Oct. 22, 2020.

Mandatory evacuation has been ordered for parts of Estes Park with the following boundaries: north border of Fall River Road, south border of Highway 36, west border of Elm Road, and the east border of Wonderview. The Larimer County webpage with information about the Cameron Peak Fire now has evacuation updates, including a map, for the east side of the East Troublesome Fire.

Grandby is not under a mandatory evacuation order, as of 1 p.m. Thursday.

Rocky Mountain National Park is closed.

We will update this article as more information is available.


Updated October 22, 2020   |   8:03 a.m. MDT

Map of the East Troublesome Fire
Map of the East Troublesome Fire at 12:30 a.m. MDT Oct. 22, 2020.

The East Troublesome Fire in Colorado grew six times larger Wednesday night. In a 28-hour period, from 8:55 p.m. October 20 to 12:30 a.m. October 22, it spread 19 miles increasing from 19,000 acres to 125,602 acres. (see the map above, and also the one below)

A mapping flight showed that it spread east across Highway 125, continued for 12 miles to Highway 34, and was last mapped 6 miles further east at the 12,000-foot mountains in Rocky Mountain National Park. At 12:30 a.m. Thursday it was about 10 miles west-southwest of Estes Park. The fire may have difficulty crossing the Continental Divide to get much closer to the town.

The community of Grand Lake on Highway 34 was impacted as well as areas west of Shadow Mountain Lake.

On the map below, you can zoom in and out.

When the fire was mapped Wednesday night the south side of the fire had not crossed Highway 40, remaining about one mile to the north. Overnight firefighters conducted a burning operation north of the highway, which was closed in the area at about 12:30 a.m. Thursday.

Evacuation orders and pre-evacuation notices are in effect.  Current evacuation information can be found at gcemergency.com, and at the Facebook page of the Grand County Sheriff’s Department.

The weather forecast indicates the fire could continue rapid growth until snow begins Saturday evening. Strong winds out of the west-southwest and west are predicted gusting to 37 mph Thursday, 22 Friday, and 39 on Saturday along with relative humidities in the 20s.

East Troublesome Fire spreads east across Highway 125

Size estimated at 30,000 acres

Updated October 21, 2020   |   9:26 p.m. MDT

East Troublesome Fire map
East Troublesome Fire at 6:50 p.m. MDT October 21, 2020.

The East Troublesome Fire made a big push to the east Wednesday afternoon and crossed Highway 125 at Cabin Creek (County Road 21) reaching a point just south of Little Gravel Mountain. It also crossed  northwest of Willow Creek Reservoir. The incident management team estimated Wednesday evening it had grown to almost 30,400 acres, an increase of 11,000 acres from Tuesday night’s mapping flight.

To see all articles on Wildfire Today about the East Troublesome Fire, including the most recent, click here.

Additional evacuations have been ordered. At 4:15 p.m. the Sheriff issued an evacuation notice for Area E; east of Highway 125 from milepost 5 to Highway 40. Highway 40 is open. Highway 125 remains closed.

More information about evacuations.

When the fire spotted across Highway 125 there was nothing firefighters could do to contain it at that location. The smoke from the main fire made it impossible for aircraft to work in the area and the fire behavior was too extreme for firefighters to work safely on the ground.

Aircraft on the southeast portion of the fire had to be shut down in the afternoon due to very strong winds.

Wednesday afternoon a weather station west of the fire recorded sustained 26 mph winds out of the west-southwest gusting at 32 to 40 mph with relative humidity of 11 percent. The Wednesday night forecast for the fire east of highway 125 calls for west-southwest winds of 16 gusting to 25 continuing into Thursday. The wind will decrease substantially Thursday night then increase again on Friday.

Five to seven inches of snow is expected beginning Saturday evening.

East Troublesome Fire
East Troublesome Fire at 4:56 p.m. MDT Oct. 21, 2020. As seen from Kremmling.

Updated October 21, 2020   |   8:33 a.m. MDT

retardant drop on the East Troublesome Fire
A BAe-146 air tanker makes a retardant drop on the East Troublesome Fire. Photo by Cassie Goldgehn.

The East Troublesome Fire 11 miles northeast of Kremmling, Colorado was mapped Tuesday night as having grown to within about 2 miles of Highway 40 on the southeast side and approximately 1/2 mile from Highway 125 on the east side.

The mapping flight Tuesday night estimated the fire had burned about 19,000 acres.

Evacuation orders and pre-evacuation notices are in effect.  Current evacuation information can be found at gcemergency.com. Colorado Department of Transportation has closed Highway 125 north of Granby from milepost 5 to 27.


October 20, 2020 | 3:30 p.m. MDT

East Troublesome Fire
East Troublesome Fire Oct. 18, 2020. Inciweb.

Mostly sunny skies will dominate Tuesday on the East Troublesome fire 43 miles west of Boulder, Colorado. Low relative humidity indices and warm temperatures are producing near red flag conditions. Winds from the southwest will transition to the northwest in the afternoon at 15-20 mph with gusts to 30 mph.

Poor humidity recovery and strong winds continued to push the fire to the north and east to the Ethel Creek and East Troublesome Creek drainages Monday night. The fire is estimated at 15,546 acres with 293 personnel currently assigned.

On Tuesday aircraft will continue water and retardant drops on active areas in the north and southeast parts of the fire. Helicopters will engage in bucket work on the eastern side of the active fire front near Kinney Creek, Sawmill Creek, and the Highway 125 corridor protecting values at risk. A helibase is being established in Kremmling to support air operations.

Ground crews are tying lines together on the north side of the fire. Some resources have shifted to the southeast section of the fire to assist in containing spot fires and increasing structure protection efforts. A second structure protection group has been created specifically to install hose lays and sprinklers around structures along the Highway 125 and Highway 40 corridors. Crews are working to reinforce fire lines around Grouse Mountain using multiple strategies which could include tactical firing operations as conditions allow.

(The above is adapted from an update by the incident management team October 20, 2020.)

The fire is 11 air miles northeast of Kremmling. On Monday night it was active on the north and east sides, but was most active on the southeast side 4 miles north of Hot Sulphur Springs. It was about a mile west of Highway 125.

Fires are usually named after a nearby landmark. In this case it was East Troublesome Creek.