Category Archives: weather

Upper Las Virgenes Canyon Open Space Preserve (Ahmanson Ranch) After the 2025 Kenneth Fire

Ahmanson Ranch after the 2025 Kenneth Fire

The Kenneth Fire started at about 2:30 PM on January 9, 2025, near the Victory Trailhead of Upper Las Virgenes Canyon Open Space Preserve (Ahmanson Ranch). The Los Angeles Fire Department issued an alert about the Kenneth Fire at 2:39 PM.

According to the CAL FIRE Kenneth Fire Incident Page, the fire burned 1,052 acres, and was contained on January 12, 2025. The Kenneth Fire is the third significant fire to affect this area in the last 20 years — the other two being the 2005 Topanga Fire and 2018 Woolsey Fire.

At about the time the fire started, a personal weather station near the Victory Trailhead recorded the wind from the ENE at about 11 mph, gusting to 22 mph. At this station, the wind moderated somewhat over the course of the afternoon and early evening, but picked back up overnight.

The vegetation within the burn area is oak savanna — a plant community characterized by grassland and scattered oaks. In the case of Ahmanson Ranch the oaks are valley oaks and coast live oaks. The last known blue oak in the Preserve died in the Winter of 2022-23.

Taking into account their respective populations, the percentage of valley oaks destroyed by the Kenneth Fire far exceeded the percentage of coast live oaks. As the climate has warmed, the mortality rate of valley oaks in the southern part of their range has been increasing and their range retreating northward.

Although the wind was not as strong as it was on January 7-8, it was exceptionally dry. Prior to January 2025, Downtown Los Angeles only recorded 0.16 inch or rain for the Rain Year starting July 1 and  Water Year beginning October 1. As of January 9, the period July 1, 2024 to January 9, 2025 was tied with 1962-63 as the driest on record.

Here are some photos and notes from recent runs in Upper Las Virgenes Canyon Open Space Preserve (Ahmanson Ranch) following the 2025 Kenneth Fire.

Some related posts:
2025 Kenneth Fire Perimeter and Some Area Trails
Very Dry Start to the Downtown Los Angeles 2024-2025 Rain Year
After the Woolsey Fire: Ahmanson Ranch
The Topanga Fire, Part I: Rain, Wind and Fire

Trippet Ranch Loop Two Days Before the 2025 Palisades Fire

Fall color along the Musch Trail in January
Sycamores along the Musch Trail

Update February 8, 2025. See the January 26 Trail Update from the Santa Monica Mountains Task Force  regarding some of the impacts of the Palisades Fire on the area’s trails .

The Sunday before the start of the Palisades Fire, I ran the Trippet Ranch Loop from the Top of Reseda. Yet another weak cold front had brushed Southern California, producing little precipitation. The weather was nearly perfect for the run — breezy at times, with moderate temperatures and some high clouds.

The NWS Los Angeles/Oxnard office was already expressing concern about a potentially dangerous wind event early in the week. In an Area Forecast Discussion midday Sunday, they warned, “..STRONG AND DAMAGING WINDS AND HIGH FIRE DANGER LIKELY FOR PORTIONS OF VENTURA AND LOS ANGELES COUNTIES…” Of course, few of us could envision the staggering devastation that would ensue in the week ahead.

Sunrise from Fire Road #30, near the beginning of the Trippet Ranch Loop from the Top of Reseda.
Sunrise from Fire Road #30, near the beginning of the Trippet Ranch Loop from the Top of Reseda.

The eastern horizon glowed orange as I ran down Fire Road #30 from dirt Mulholland. If I could have seen a few days into the future, the road would have been filled with firefighters and equipment battling to halt the Palisades Fire’s westward progress. The road was empty this morning, save the scurrying towhees and raucous scrub jays.

At the Hub, I stopped to take a photo of Eagle Rock. Bush poppy, a prolific fire follower, covered much of the area between the Hub and Eagle Rock. This burned in the 2021 Palisades Fire. The hazy view extended past Eagle Rock to Calabasas Peak and Boney Mountain.

Downtown Los Angeles from Temescal Peak and the chaparral typical of the area.
Downtown Los Angeles from Temescal Peak and the chaparral typical of the area.

Before descending to Trippet Ranch on Eagle Springs Fire Road, I turned east on Temescal Ridge Fire Road. I would return to the Hub, but first, I wanted to visit Temescal Peak and Temescal Lookout. These viewpoints have expansive views of the Santa Monica Mountains and beyond. This photo (from a previous run) is a view of downtown Los Angeles from Temescal Peak. The chaparral in the photo is typical of the vegetation in the Santa Monica Mountains. Most of this would have burned in the 2025 Palisades Fire. On a day with good visibility, San Jacinto Peak can be seen from either viewpoint. Despite some haziness, San Jacinto Peak could still be seen from Temescal Lookout this morning.

Returning to the Hub, I ran down Eagle Springs Fire Road and through the footprint of the 2021 Palisades Fire. The bright yellow flowers of bush poppy shone brightly in the morning sun. When the perimeter of the 2021 fire is overlapped with the 2025 fire, it suggests that bush poppy and other transitional vegetation in the 2021 burn area did not burn as readily in the 2025 fire as the usual chaparral species.

Mule deer near the Trippet Ranch parking lot. (thumbnail)
Mule deer near the Trippet Ranch parking lot.

Later, as I approached the Trippet Ranch parking lot, I was welcomed by the local mule deer herd (video). It’s common to see them here and other nearby fields. There were a few does of various ages and a multi-point buck. Although extremely wary, several of the does were oddly curious.

Continuing past the information kiosk at the corner of the parking lot, I headed up the paved road and picked up the Musch Trail. Although we haven’t had much rain this Rain Year, the past two Rain Years were very wet. Paradoxically, the vegetation is bone dry, but some small creeks and springs that haven’t run for years — such as Eagle Springs — still have water. Reflecting last year’s rain, a heavy load of red-orange berries cover most of the toyon bushes along the Musch Trail and throughout the Santa Monica Mountains.

Canyon sunflower along the Garapito Trail. (thumbnail)
Canyon sunflower along the Garapito Trail

At the top of the Musch Trail, I turned left and worked up Eagle Rock Fire Road, past Eagle Rock, to the top of the Garapito Trail. At times, over the past couple of years, this outstanding trail has been almost impassable. Volunteer trailwork has cleared and repaired the trail multiple times. It’s a good trail for wildflowers, but the lack of rain has reduced the number of early bloomers. Today, canyon sunflower, California everlasting, and California fuchsia were blooming along the trail. This misshapen bush sunflower was blooming along Fire Road #30, near its junction with the Garapito Trail.

This zoomed-in 3D-terrain view of the Palisades Fire perimeter shows the general area of the Trippet Ranch Loop, Temescal Peak, and Temescal Lookout. As of January 23, the Trippet Ranch main parking lot, Musch Trail and Camp, and Eagle Rock appear to be outside of the burn area. Most of Eagle Rock Fire Road, Eagle Springs Fire Road, and the Garapito Trail also appear to be outside the perimeter.

Most parks and open space areas in or near the Palisades Fire burn area remain closed. For more information see:

2025 Los Angeles Fires
California State Parks Incidents Overview
MRCA Parks
Topanga State Park
Top of Reseda (Marvin Braude Mulholland Gateway Park)

Very Dry Start to the Downtown Los Angeles 2024-2025 Rain Year

Blooming brittlebush (Encelia farinosa) on the southwest corner of Lasky Mesa at Ahmanson Ranch on December 24, 2024.

The last time Downtown Los Angeles had more than a smattering of rain was mid-April 2024 — more than 250 days ago. To date, the Rain Year beginning July 1, 2024 has been one of the two driest in the 147+ year weather record for Downtown Los Angeles.

Because of the time of year, and lack of rain, not many wildflowers were blooming along Los Angeles area trails at the end of 2024. One exception was this brittlebush (Encelia farinosa) on the southwest corner of Lasky Mesa in Ahmanson Ranch.

If Los Angeles doesn’t see any rain by January 9 — which appears likely — the period July 1, 2024 to January 9, 2025 will be tied with 1962-63 for the driest on record.

Clearing Clouds, Santa Monica Mountains

Clearing clouds along the crest of the Santa Monica Mountains. Photography by Gary Valle'

Clearing clouds along the crest of the Santa Monica Mountains from Bulldog Mtwy fire road. The photograph was taken on a recent run of a variation of the Bulldog Loop.

Some related posts:
Turning California Sycamore Along Malibu Creek
Reagan Ranch at Sunrise

Predawn View From Mt. Wilson Before the Start of the ANFTR 25K

Predawn View From Mt. Wilson Before the Start of the ANFTR 25K

The Angeles National Forest Trail Race starts and ends on top of Mt. Wilson. This was the view south over Pasadena and the Los Angeles Basin from the mountain-top parking lot, about an hour and a half before sunrise and the start of the race.

Related post: The Angeles National Forest (Mt. Disappointment) Trail Race Returns

The Angeles National Forest (Mt. Disappointment) Trail Race Returns

Runner on the San Gabriel Peak Trail during the 2024 ANFTR 25K, working up toward Mt. Disappointment. Mt. Wilson is the peak with the towers. West Fork is in the canyon on the left.
Runner on the San Gabriel Peak Trail, working up toward Mt. Disappointment. Mt. Wilson is the peak with the towers. West Fork is in the canyon on the left.

Even in Southern California the weather can be a little fickle. Just two weeks ago, heat had been one of my concerns for the No Name 50K. During that race the temperature reached into the mid-80s. Heat definitely wasn’t an issue for this morning’s race on Mt. Wilson. Several days out one computer model had forecast sleet and a temperature of 32°F! Instead, at the start of the race runners were treated to a spectacular sunrise and a temperature of around 40°F.

After a five year hiatus, the Angeles National Forest (Mt. Disappointment) Trail Race is back. Started in 2005 by R.D. Gary Hilliard, this was the 14th running of the highly regarded event. Today we ran the 25K course, but in 2025 a 25K and 50K will be offered.

Sunrise on Mt. Wilson (thumbnail)
Sunrise from the ALERTCalifornia Mt. Wilson East Camera a few minutes after the start of the race. Click for larger image.

Whatever the distance, a hallmark of any ANFTR/Mt. Disappointment courses is that it starts and ends on top of Mt. Wilson (5739′). While not particularly high, the altitude is just high enough to take the edge off a runner’s performance. Many a runner has underestimated the difficulty of the final five-mile climb from West Fork to the top of Mt. Wilson — especially on a hot day in July or August.

My race went well, and I left enough in the tank to enjoy the climb up the Kenyon Devore Trail!

Thank you Gary and Pam for your dedication, passion, and the hours and hours of work required to put on a quality event! And thanks also to all the volunteers, runners, and others that support the race.

Here’s a high-resolution, interactive, 3D-terrain view of the ANFTR/Mt. Disappointment 25K course.

All the results from 2005 to 2024 are available on UltraSignup.

Next year, Jakob Herrmann will be taking over the reins of the event. The race is on Saturday, September 27, 2025, and registration for the 25K and 50K is already open.

Some related posts:
A Morning Thunderstorm, Debris-Covered Trail, Fast-Paced Fire Road, and Tough Climb on the ANFTR 25K Course!
Another Scorching Angeles National Forest/Mt. Disappointment Trail Race