A Watershed Gives Birth To Rivers

Las Virgenes Canyon Open Space Preserve

We think of streams and rivers as flowing bodies of water, but we tend to give little thought to where the the water comes from. For the Los Angeles River the water collects in rolling mountains high above the valley floor. But because our climate fluctuates between drought and flood, the water coming into the Los Angeles River is historically intermittent.

valley oak

I recently had the opportunity to explore the mountains and valleys of the Las Virgenes Canyon Open Space Preserve at the western end of the San Fernando Valley. These rolling hills with ancient oaks have been ranch land and also the testing grounds for all of the major rocket engines that have taken Americans into space.


Up until a few years ago this area was closed to the public and the land was in dispute between developers, conservation groups and activists concerned about toxins (nuclear and chemical) that had been left on the land. Unfortunately, technology often comes with a price and in this case toxins in and on the land are being cleaned up, but some of the waste is best left undisturbed. The positive side to that uncomfortable notion is that development plans were shelved and the land was purchased by the state to become parkland and a wildlife corridor. 

white-crowned sparrow

The Las Virgenes Canyon Open Space Preserve offers beautiful vistas and an opportunity to stroll a more wild side of California. In December, small flocks of migratory meadowlarks forage in the tall grass while a harrier hawk flies ominously just over their heads. A coyote watched us from the rim of a hillside. While acorn woodpeckers were so busy stashing acorns in every nook of a twisted valley oak, that they didn't even notice they were being observed. 


When the rains come and drops gather on this open area, tiny streamlets will flow in three different directions. Some will flow slightly north and down into the Simi Valley wash, some will head directly west toward Malibu Creek and the ocean, and some will flow down Bell Creek in Bell Canyon to become part of the Los Angeles River.


To reach the Las Virgenes Canyon Open Space Preserve drive west on Victory Blvd. until it dead ends. There is a nice gravel parking lot and a $3 fee helps to maintain this slice of open land. Walk the watershed are get a feeling for how important open land is for gather wildlife and water.

11/11/11 Calabasas Creek Park

Did you take a few minutes on 11/11/11 to go adventuring?

I’ve become fascinated by the Los Angeles River. I want to explore it from its trickle out of the mountains to its tumble into the sea. I think there is much to be discovered especially in relation to birdlife.

Yesterday morning we headed out to Calabasas Creek Park in old town Calabasas. It is a small bit of land tucked next to the Ventura Fwy just east of the Sagebrush Cantina. A hundred years or so ago, Calabasas Creek ran past Leonis Adobe and headed east to join with Bell Creek and Chatsworth Creek to form the headwaters of the Los Angeles River.

Forty years ago, Calabasas was a dusty half-block of old clapboard buildings and the creek was seasonal and forced into a cement drainage system. Today there seems to be a steady flow of water down the canyon. As long as that flow is a well-mannered creek, it is allowed to flow under the road and through Calabasas Creek Park.

A cement dam creates a gentle pond under wide-spreading ancient oaks and on this day the pond was dappled with mallards. The male mallards are just starting to take on their breeding plumage and they were looking quite smart.  As we overlooked the pond we noticed two fascinating things.

• Whenever the fox tree squirrels in the coast live oaks dropped an acorn into the pond, some of the mallards, mostly males, dashed to snatch it up. They were grabbing the inch-and-a-half long acorns and swallowing them down. It was amazing. I’d never heard of ducks eating acorns. And they weren’t all doing it. Some swam to the dropped fruit only to be disappointed and confused as to why others were eating these big hard things.
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• The second thing we noticed was the pattern of the ducks in the water. The spacing was amazingly regular. As we watched it became apparent that the male mallards were maintaining a minimum of 1.5 feet between themselves. A male that compromised that “personal space” was either chased away or was purposefully forcing other males to move. Females were allowed to swim in between the males without comment. This wasn’t just ducks floating on a pond, this was a very organized social gathering.

While the mallards commanded the pond and the creek flowing out of the park, overhead bushtits, oak titmice, yellow-rumped warblers and an unusual sight, a summer tanager moved through the trees. A downy woodpecker feasted on insects in an oak gall. While in the well-manicured front garden a western tanager and house finches bathed in the fountain. In all there were 11 species of birds, a western fence lizard, a huge orb spider, one gardener and us in the park.

Calabasas Creek Park offers easy access, manageable size and a quiet escape. Discover one of the watery fingers that reaches down to become the Los Angeles River.

Calabasas Creek Park is open 1 PM - 4 PM Wed. - Friday & Sunday, and 10 AM - 4 PM Saturday. For more information visit www.leonisadobemuseum.org

New Life for the Los Angeles River

What recycling/rehabilitation project is larger than reestablishing the Los Angeles River as a living river? In the last two weeks the U. S. Environmental Protection Agency has declared that the Los Angeles River is a waterway deserving of the protection of the Clean Water Act–in other words a real river.

For all of my life the Los Angeles River has been confined between concrete walls. But in recent years we have seen sections of the river reclaim its freedom. In forgotten corridors vegetation has flourished, wildlife has returned.

Many L.A. residents who have relocated here from the east regard the Los Angeles River as a glorified storm drain. They cite flooding in the 1930s and use it as evidence that the river only flows seasonally and is "dangerous." But if they would look back in history a little bit further, they would realize that there were human settlements along the river long before tract homes were built and agricultural lands were sectioned off. The native people and the Spanish lived here because there was water and they built on higher ground up from the meandering and somewhat marshy river because they respected the natural forces that caused the waterway to fluctuate seasonally.

I grew up in West Hills (when it was still Canoga Park) along Bell Creek, one of the three small streams that start the Los Angeles River. Though wild in the hillsides, the creek was cemented in by developers once it met the valley. Still, was a place where you could find tadpoles and raccoons. Though it trickled in the heat of summer, Bell Creek always flowed. Local folklore tells of a Native American village that stood here at the base of the foothills above the flood plain of the central part of the valley.

Leonis Adobe in Calabasas is built along Arroyo Calabasas which joins Bell and Chatsworth Creeks to form the River (just east of Canoga High School). At its beginnings this stream has been cleaned of debris in recent years and bubbles freely past the ranch house built in 1844. That is until it flows into Los Angeles County, where it too is confined in concrete. Topanga Mall is actually built over it.

The first house that my husband and I lived in was in Van Nuys along Bull Creek, another tributary confined by the Army Corp. of Engineers. This stream was contained so that Van Nuys Airfield could be built. In the last two years, the lower section of Bull Creek, just before it joins the river, has been rehabilitated. If you want to see what our waterways could have looked like prior to the paving of the San Fernando Valley visit Lake Balboa Park and stop at the dirt turnout before you reach the lake area. Walk along newly liberated Bull Creek and you will be surprised at the wildlife. This island of habitat is home to ground squirrels and desert cottontail rabbits. The sandy cliff banks are perfect nesting areas for swallows. Ducks and herons thrive.

To experience what marshy wetland areas were like and the myriad of birds that lived there, visit Sepulveda Basin Wildlife Area. The surrounding grasslands, just slightly elevated above the wetland, feed a variety of native sparrows and finches visiting in the winter. These areas are flooded following storms, just as they should be, so the grasses can grow in the silt enriched soil.

Travel down the Los Angeles River beyond Burbank and you will come to areas where you can see the ground water bubbling up in the channel. In some areas it is lifting the concrete. The natural river is trying to return. Embracing the Los Angeles River.

Yes, applying the Clean Water Act is going to mean that each of us as individuals is going to become legally responsible for what runs off of our property and into the river. If you needed more than ethical and health reasons for limiting pesticides and herbicides sprayed on your property, this is it. For me, I'm excited. I have always loved the Los Angeles River, even when it was nearly dry. It could become the green heart of our city if we can all come together and find the positive thread that connects us together, the Los Angeles River.

For more on the recent status change of the Los Angeles River visit our local state representative, Julia Brownley's webpage.