In normal to wet rain seasons vernal pools can be found throughout the Simi Hills. The pool pictured above is near the sheep corral at China Flat, and another small pond was found nearby, along Albertson Motorway fire road. I've also found vernal pools in the Rocky Peak area and near Sage Ranch.

Geologically, the Simi Hills are characterized by the sandstone rocks of the Chatsworth formation. These inclined layers are of varying hardness, and erode at different rates. It's my guess that water collects in sandy soils between, or at the base of, the more resistant layers.

The photographs of the ponds at China Flat are from Sunday's Scenic Route to Simi Peak run.

When the rainy season turns wet and the grasses green, all routes to Simi Peak are scenic, but the varied trails and terrain, and the wilderness feel of the more remote sections of this 21.5 mile run makes it one of my local favorites.

It is a longer variation of the route described in the post Upper Las Virgenes Canyon Backcountry. The run starts at the Victory (or Vanowen, or Las Virgenes) trailhead of Upper Las Virgenes Canyon Open Space Preserve and explores the headwaters of Las Virgenes Creek. At the junction of the power line service road and "backcountry" trail, instead of turning south up the power line service road, this option works west over to Albertson Motorway fire road, and on to China Flat and Simi Peak.

Here's a Google Earth image and Google Earth KMZ file of a GPS trace of the route.

Lasky Mesa from a ridge near Bell Canyon. Low clouds from a rapidly advancing marine layer are moving into the San Fernando Valley. Saddle Peak can be seen in the distance, on the right.

From a run earlier earlier this week.

Last updated 02/22/10. Symmetrical lacing on XT Wings 2!

Wow -- what a great ride! That was my impression the first time I used the Salomon XT Wings trail running shoes. That continues to be my feeling after using the shoe for a couple of weeks and doing several runs in the 15-20 mile range. For my particular trail running requirements, this shoe has a near perfect balance of comfort, smooth ride, cushioning, traction and support.

Southern California can have inclement Winter weather. This January downtown Los Angeles experienced a streak with 8 days of measurable rain, and last year temperatures in the suburbs plunged to a frigid 20°F. Maybe this doesn't compare to Seattle's 2005-2006 rain streak of 27 days, or International Falls' recent record low of 40° below zero, but it qualifies as rainy and cold none the less.

Today it was not rainy and cold. It was just about as pleasant as a day could be. Skies were blue, winds were light, and the temperature was in the mid-seventies. Starting at the Wendy Dr. trailhead on Potrero Rd., we enjoyed the perfect weather by doing a 14.5 mile variant of the Boney Mountain Half Marathon Course.

The photograph above is of the Hidden Pond Trail near Hidden Pond -- recently restored by Winter rains.

Related posts: Boney Mountain Half Marathon, Big Sycamore Canyon Circuit, Boney Mountain - Big Sycamore Canyon Circuit

From a run at Ahmanson Ranch -- now Upper Las Virgenes Canyon Open Space Preserve.

From a run at Ahmanson Ranch -- now Upper Las Virgenes Canyon Open Space Preserve.