Saddle Peak and Malibu Canyon from the Backbone Trail, in the Santa Monica Mountains, near Los Angeles.

According to geologist Thomas Dibblee, Jr., Malibu Creek may be an ancestral stream that predated the uplift of the Santa Monica Mountains. Another possibility, suggested in this technical paper, is that a coastal stream eroded inland, and captured an inland drainage. Such a process may be occurring in Big Sycamore Canyon, which appears to be eroding headward along the Sycamore Canyon Fault, and may eventually capture a drainage in the Potrero Valley.

From Sunday's run in Malibu Creek State Park.

My trail running shoes had not been wet or muddy since sometime in December. During the entire month of January, Downtown Los Angeles (USC) recorded about one-third of an inch of rain. Not only had it been dry, it had been warm. On a dozen of those January days, the high temperature topped eighty degrees, setting a new record!

But Winter had returned. The past three days, Los Angeles had received about 1.5 inches of rain, valley and foothill locations 2-4 inches, and some mountain stations as much as 5-7 inches. And more Winter weather was on the way. Excited about the change in the weather, today's run was one with good muck and mire potential -- the Bulldog Loop in Malibu Creek State Park.

We were not disappointed. Near Century Lake, mud the consistency of peanut butter pulled at our shoes and slowed the climb up Crags Rd, Further west, near the  M.A.S.H. site, calf-deep water on the trail washed the gunk off.

The trail conditions on the remainder of the loop were more straightforward. From time to time, shafts of sun would pierce the clouds, resulting in a patchwork of shadow and sun that emphasized the rugged terrain. Along the crest, the ocean views were superb! Before descending to Tapia Park we ran out to Mesa Peak, and then followed the ridgeline to an overlook of the coast. (Marked peak 1800 on the topo.)

Including the side trip to the overlook, this variation of the Bulldog loop worked out to an exhilarating 16.5 miles, with an elevation gain/loss of about 2700 ft.

If current forecasts and outlooks for this month hold true, this won't be our last wet and muddy trail run this February. In a couple of weeks, Los Angeles rainfall totals may climb above normal for the first time this rain season. We'll see!

Some related posts: Fog Along Malibu Creek, Bulldog Loop and the Corral Fire

The idea was to do an interesting trail run that wasn't quite as long and strenuous as last week's Bandit 30K Course Preview. That was the idea. I could have calculated the mileage and elevation gain of our projected route, but sometimes part of the fun of trail running is not knowing the exact route, how long it will take, or how strenuous it might be.

This particular exploration would visit two of the most scenic areas in the Santa Monica Mountains -- Serrano Valley and La Jolla Valley. Many variations of this loop are possible. Our base route included the Ray Miller/Backbone Trail, Fireline Trail, Serrano Canyon Trail, Serrano Valley Trail, Old Boney Trail, Wood Canyon Vista Trail, La Jolla Valley Loop Trail, La Jolla Canyon Trail and connecting roads.

In addition to its wonderful scenery, this course is characterized by moderate uphills that are generally very runnable. The side trips to to the old ranch site in Serrano Valley, and to Mugu Peak pushed the route beyond the 30K mark, but were worth every step. Here's a Google Earth image and Google Earth KMZ file of a GPS trace of the route. Since none of us had done the eastern leg of the La Jolla Valley Loop Trail, this time we did Mugu Peak from the east. The route around the valley to the western side of Mugu Peak is also shown.

Here is a Live Browser View of the run using the Google Earth browser plug-in (Chrome, IE7, IE6, Firefox).

Some related posts: Serrano Valley from Wendy Drive; La Jolla Valley & Mugu Peak from Wendy Drive; Laguna Peak, La Jolla Valley, and the Channel Islands

Hill 2484 is near the top of the oil field service road that connects Las Llajas Canyon to Rocky Peak fire road.

From Sunday's Bandit 30K Course Preview run.

Some related posts: Chumash-Las Llajas Loop, Chumash Trail Rocks & Snow

Because of a scheduling conflict, two friends weren't going to be able to enter a challenging new Southern California trail race -- the Bandit 30K/14K -- so today we previewed the 30K course.

The race starts in Corriganville Park in Simi Valley, and incorporates several of my favorite local trails in Rocky Peak Park. With an elevation gain in excess of 3200 ft., and varied terrain, the race promises to be a memorable test of trail running skill and endurance. A plus is that it is being run in March, when the hills are green; there is water in the creek crossings; and wildflowers along the trails.

So how was the 30K course? In a few words -- strenuous, scenic and technical -- and more difficult than either the Boney Mountain 21K or Bulldog 22K. Get all the details at BanditTrailRun.com.

Update 12/09/10. The date of the 2011 Bandit 15K/30K is Sunday, February 20th. A 50K distance has been added! Here's a Google Earth flyover of the Bandit 30K course, created from a GPS trace of the 2010 race.

Related post: Bandit 30K 2009

My legs were still pretty worked from the Boney Mountain Half Marathon. Instead of backing off of the pace on my weekday workouts, I had continued to experiment with a change in running technique that was resulting in faster paced runs. I was excited about the increase in speed, but logging fast times on oft-run courses after a strenuous race doesn't equal recovery. Neither does blasting up a peak in the San Gabriel Mountains.

Green beneath Summer's bleached stalks, the growth of this grass at Sage Ranch reflects the near normal rain season we've had to date in the Los Angeles area, and over much of Southern California. Since the start of the water year on July 1, Downtown Los Angeles (USC) has recorded 4.66 inches of rain. When this photograph was taken, January 11th, 4.66 inches was almost exactly normal rainfall for the date.

However, as is so often the case in Southern California, this apparent normality is the sum of offsetting wet and dry periods. December's precipitation was generally well above normal, but January has been dry, dry, dry. Today, the Los Angeles rainfall total is about 0.5 inch below normal, and every day it doesn't rain, our deficit increases by about 0.10 inch.

So when might it rain? A very strong 200 kt Pacific jet stream has pushed up a high pressure ridge over the West Coast, blocking storms and warming temperatures. Big upper level ridges such as this are consistent with La Nina, and have been a recurring theme this Fall and Winter. Much of our rainfall and cold weather this season has occurred when an extended Pacific jet collapses or contracts, and a blocking ridge shifts west, opening the door to cold storms plunging down the backside of the ridge from the north.

Over the next 1-2 weeks, this is expected to happen again, but this time there is a wildcard in the mix. One of the reasons the Pacific jet is so strong is the active phase of the Madden-Julian Oscillation (MJO) is present in the Western Pacific. As described in this Climate Prediction Center document, this scenario sometimes leads to a heavy West Coast precipitation event.

It's too far out for the medium range models to be of much help in assessing the likelihood of such an event developing. At the moment, about the only thing that can be said with some certainty is that a pattern change is in the works, and by the end of January there is a chance of some rain in California and the West. We'll see!

Related post: Southern California 2008-2009 Winter Precipitation Outlook, Snow on Oat Mountain

Deep in shade on a north-facing chaparral slope, this California fuchsia (Epilobium canum ssp. canum) has not savored direct sunshine for weeks. Overnight temperatures in the Santa Monica Mountains have dropped to freezing several times this Winter, and frosts have been common. But this hardy plant continues to bloom.

According to the Jepson Manual this subspecies ranges up to about 5000 ft. in elevation, and the parent species up to about 10,000 ft. As a genus, Epilobium is well represented by species that grow at higher latitudes and elevations, and must have developed adaptations that help it flourish in cooler climes.

From a run on the Old Boney Trail on December 27, 2008.

The posts Boney Mountain - Big Sycamore Canyon Circuit and Boney Mountain Western Ridge & Loop describe two routes that ascend the north side of Boney Mountain -- a circuitous eastern ridge route, and a more difficult western ridge.

These two routes can be combined into an adventurous loop that starts and ends at the junction of Danielson Road and the Old Boney Trail. The loop, with no side trips, works out to about 4 miles. Add in the 2.5 mile approach from the Wendy Drive trailhead, and the total distance for the course is about 9 miles, with an elevation gain of a bit over 2000 ft.

I did the loop counterclockwise -- up the western ridge and then down the eastern. The New Year's weather could not have been better. Dense fog clung to the coast, but a brisk offshore breeze kept inland views crystal-clear. On the way up the western ridge I couldn't resist doing a short detour to climb one of the crag's appealing summits.

At the top of the western ridge, I briefly debated doing Tri-Peaks and Big Dome, but was hoping to make it home by noon, so skipped those side trips.

With gravity on my side, the run down the eastern ridge was not nearly as gnarly as I thought it might be. I was running in Inov-8 Roclite 305s -- nimble shoes with a fell running heritage. Mine weigh only 21.1 oz./pair (US 9.0) and were particularly well-suited to the rough terrain.

This climb and adventure run was a great way to start the New Year -- and I did make it home in time for lunch with my wife!

Here's a Google Earth image of a GPS trace of my route.

Two routes are commonly used to climb the rugged north side of Boney Mountain. One route ascends a ridge to the east of the Danielson cabin site, and the other a rocky ridge to the west of the site. Today, I was planning to do the western ridge, and then continue up and over Tri-Peaks to the Chamberlain segment of the Backbone Trail.

Clouds moving onshore ahead of a low pressure system that is expected to produce rain in Southern California Christmas Eve into Christmas Day. Track of the low is now projected to be a little more to the west, so the heaviest rain may occur just offshore.

From an out and back run yesterday to "fossil point" via the Chumash Trail and Rocky Peak fire road. View is of Simi Valley, with Boney Mountain and Conejo Mountain in the distance.

Comfortable, cushioned and durable. That's how I would characterize the adidas Response Trail. I've had two pairs of the Response Trail 14s in my shoe rotation since September 2007, and logged around 1000 miles between them. (Your mileage may vary.)

About a month ago I replaced one of the pairs with the adidas Response Trail 15s. I've put 75 miles on the new pair, and other than a change in colors, it seems not much has changed in the shoe. It's still well-cushioned, comfortable and lightweight. The new pair weighed in at 24.7 oz./pair (US 9.5). At $80 or less, the Response Trail 15s are an excellent value.

At the moment, my primary trail running shoes are the Salomon XT Wings (105 miles), Salomon SpeedComp (110 miles), and adidas Response Trail 15s.