Category Archives: nature|trees

nature, nature|trees, photography, photography|panoramic

Little Jimmy Spring Incense Cedar

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A large incense-cedar (Calocedrus decurrens) near Little Jimmy Spring in the San Gabriel Mountains of Southern California.

This is the large incense-cedar (Calocedrus decurrens) mentioned in the post Snowless San Gabriels. It is located on a northeast facing slope near Little Jimmy Spring at an elevation of about 7460′ in the San Gabriel Mountains of Southern California. A vertical panorama better shows the size of this tree.

The scar from the 2002 Curve Fire can be seen on the left side of the tree. The black and white cap is about 7 inches wide and suggests a diameter of perhaps 70-80 inches. According to the species information in the FEIS database, in Southern California the largest incense-cedars generally have a diameter at breast height (d.b.h.) of 36-48 inches, but in the Sierra Nevada frequently reach diameters of 84 inches. According to the database, trees over about 200 years old are subject to dry rot, but large trees are often over 500 years old.

Related posts: Pine Mountain Juniper, Heat Wave, Lightning Tree

nature, nature|trees, nature|weather, nature|wildflowers, photography, running, running|adventures, trails, trails|san gabriels

Three Points – Mt. Waterman Loop

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Trail sign on the Mt. Waterman Trail in the San Gabriel Mountains.

Five miles of (mostly) downhill to go. Running through an old growth forest of Jeffrey Pine, Sugar Pine and Incense Cedar, I relished being on a pine needle covered trail at 7000 ft. in the San Gabriel Mountains.

In a record dry water year, I had been curious to see how the mountains were faring. Although creeks were very low and grasses dry, my impression was that groundwater resources were not quite as bad. The usual springs and seeps still muddied the trail. In 2005 the San Gabriel Mountains were deluged with rain, and in the 2006 the rainfall was nearly normal, so some carryover would be expected.

Update May 27, 2007. My impression of groundwater resources may have been overly optimistic. On a run to Mt. Baden-Powell from Islip Saddle, I stopped by Little Jimmy Spring. It was nearly as low as in late August 2002, when Los Angeles had just experienced its driest water year on record. This year will likely break the 2001-2002 record.

Even so, it was obviously much drier than normal. There were fewer wildflowers, and some young Incense Cedars looked as if they might be stressed. On the plus side, manzanita and currant were blooming in profusion, and perhaps 30-35 scarlet red stalks of snow plant were seen on the loop.

About three miles from Three Points I happened upon another Jeffrey Pine that had been struck by lightning. This strike appeared to more energetic than the bolt that struck the tree on the Baldy North Backbone Trail. The spiral scar was wider and braided at some points, and the strike ignited the tree. Where the Baldy tree was on a sharp ridge crest, this tree was several hundred feet below the main crest in an area where the trail started to work around a projecting ridge.

More about this loop and a Google Earth image of the course can be found in the post Manzanita Morning.

nature, nature|botany, nature|trees, weather, weather|southern california

Ahmanson Blue Oak

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Photograph of leaves of blue oak in East Las Virgenes Canyon.

Update April 14, 2023. The Ahmanson Blue Oak has died. Please see the post Ahmanson Blue Oak Succumbs to Climate Change.

Blue oak (Quercus douglasii) is a characteristic oak of the lower elevations of the Sierra foothills and coastal mountains, its range essentially encircling California’s Central Valley.

Based on its reported range, Upper Las Virgenes Canyon Open Space Preserve (formerly Ahmanson Ranch) contains one of the southernmost populations of blue oak within its range. However, the predominate deciduous oak in the area is valley oak (Quercus lobata), and occurrences of blue oak appear to be rare. Regional climate modeling suggests that over the next century the range of blue oak could shift northward and diminish to nearly 60% of its current range.

Blue oak is reported to hybridize with valley oak, however a 2005 study suggests hybrids of these species may be more rare than generally accepted.

The photograph of the leaves of a blue oak was taken on a run along East Las Virgenes Canyon to Lasky Mesa on April 24, 2007. A valley oak immediately adjacent to this blue oak was killed in the 2005 Topanga Fire.

Related posts: Ahmanson Blue Oak Succumbs to Climate Change, Valley Oak Savanna, Laskey Mesa Oak

Technical papers:

Modeled regional climate change and California endemic oak ranges.
Kueppers, L.M., M.A. Snyder, L.C. Sloan, E.S. Zavaleta, and Brian Fulfrost. 2005.
Proceedings of the National Academy of Sciences of the United States of America, 102(45): 16281 – 16286.

Limited hybridization between Quercus lobata and Quercus douglasii (Fagaceae) in a mixed stand in central coastal California.
Kathleen J. Craft, Mary V. Ashley and Walter D. Koenig.
American Journal of Botany. 2002;89:1792-1798.

nature, nature|trees, photography, photography|landscape

Ahmanson Lollipop Tree

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The Ahmanson lollipop tree can be seen on the skyline south of the main drag about 1.25 miles from the Victory trailhead.

On the South Fork American River is a tree high on a ridge that rafters and kayakers refer to as the Lollipop Tree. It marks the beginning of the Gorge run and the class III rapid “Fowler’s Rock.”

When I run on the “main drag” at Ahmanson Ranch (Upper Las Virgenes Open Space Preserve) there is an oak tree that sits on a hilltop near Laskey Mesa that reminds me of the S.F. American tree. The Ahmanson lollipop tree can be seen on the skyline south of the main drag about a mile from the Victory trailhead.

This photograph was taken on an exploratory out and back run to the headwaters of Las Virgenes Creek on Christmas Eve.

Note: Jon Sutherland nicknamed the main road that connects the Victory trailhead to Las Virgenes Canyon the “main drag.” Jon has run out at Ahmanson for more than 30 years. He is second on the Running Streak List for most consecutive days run. As of September 1, 2006 his streak was 13,613 consecutive days (37 years 99 days), and still counting!

nature, nature|trees, photography, photography|landscape, trails, trails|smmc open space

Chumash-Hummingbird Loop

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Oak, grass, and clouds in Simi Valley, California.

The Chumash and Hummingbird trails are popular trails in the eastern Simi Valley, north of the 118 Freeway. These trails ascend the steep western flank of the Santa Susana Mountains to Rocky Peak fireroad. A scenic loop can be created using these trails and a connection between the Chumash and Hummingbird trailheads down in the valley. There are a few ways to do this, and the loop has proved popular.

The Chumash trailhead is on Flanagan Dr., off of Yosemite, and the Hummingbird trailhead is on Kuehner Dr. just north of the 118 Frwy. Currently, no official trail connects these trailheads. To connect them via city streets (Yosemite, E. Los Angeles Ave., Kuehner) is a long detour on pavement and doesn’t make sense from a trail-running or hiking point of view.

For many years a more direct, unofficial route has been used to connect the two trailheads. Most of the route is on dirt roads through undeveloped property. Using this route the length of the Chumash-Hummingbird loop works out to about 9.2 miles with about 1700′ of elevation gain. It’s an excellent hike, run or ride with great scenery and views.

For a number of years access to the Hummingbird Trail from Kuehner Dr. has been across property that is now being developed. A chain link fence has been in place along Kuehner for some time. Apparently, at the north end of this chain link fence there is a conservation easement that allows access to the Hummingbird Trail  via a corridor adjacent to the (private) Hummingbird Ranch property. It was necessary to use this access easement when I ran this loop last weekend.

The property on the west side of Kuehner is also being developed. As I understand it, Mt. Sinai Dr. will eventually connect to Kuehner and a small parking lot will be built for trail users. Hopefully, some provision will also be made to officially connect the Chumash and Hummingbird trailheads and preserve this scenic loop.

The photograph of the oak is from a run of the loop on April 28, 2005.

Update 12/26/06 – Mike Kuhn, the director of the Rancho Simi Trailblazers, sent me the following information regarding the Hummingbird trail easement:

“At the top of Kuehner Drive is a cul-de-sac at the gate to the Hummingbird’s Nest Ranch. The white plastic fence marks the boundary of the ranch. There is a corridor of land owned by the park district along the white plastic fence down to the creek and hence to the usual crossing of the creek.”

He also said that a trail connection between Chumash and Hummingbird is in the planning stages, and encourages all trail users to be patient while the construction at Kuehner is underway.

Related post: Lower Stagecoach – Hummingbird Loop