I like splashing through streams as much as anyone does, but today I wanted to try and keep my shoes and socks dry. This Winter that’s been surprisingly hard to do.
Weekdays, I often run from the Victory trailhead at Ahmanson Ranch over to Las Virgenes Canyon and back. But it had rained in the Los Angeles area for four days straight. There was just no question that Ahmanson was going to be wet and muddy, and Las Virgenes Creek would be too wide to jump. I’d have to wade the creek crossings — again.
Paintbrush (Castilleja affinis) along Rocky Peak Road
That’s why this afternoon, I was doing an out-and-back run on Rocky Peak Road from the 118 Frwy trailhead. As a result of the area’s sandstone geology, Rocky Peak Road is usually a pretty good place to run during periods of wet weather. For one thing, there are no creeks to cross. Plus, the rocky and sandy road doesn’t have many areas of “glob on your shoes” mud. It also has excellent views of the San Fernando and Simi Valleys and surrounding mountains.
My turnaround point today was the top of the Chumash Trail, which is a little less than four miles from the Rocky Peak trailhead. I sometimes continue past the Chumash Trail another mile to Fossil Point.
Today, there was one short, muddy stretch that could be mostly avoided and a few large mud puddles I could walk around. At the end of the run I didn’t have to switch shoes to drive home!
Originally published June 28, 2008. Updated December 30. 2022.
Without a doubt, the Chumash Trail is one of my favorite short “after work” trail runs. Popular among hikers, mountain bikers, and runners, the Chumash Trail starts on Flanagan Drive in eastern Simi Valley and ascends the convoluted western flank of Rocky Peak Park to Rocky Peak Fire Road. It’s single-track trail all the way, gaining about 1175′ over 2.7 miles.
From a trail runner’s training perspective, it is a nearly ideal short, technical, higher heart rate workout. It has a few tough sections but is generally very runnable. When I’m chugging up the trail, it seems just about the time my heart rate is going to go lactic, the trail will back off or contour. Because I usually run the trail near my aerobic maximum, it’s a great indicator of where I am in my training. Over-training, or any other fitness issue, is usually plainly — and sometimes painfully — evident.
In many ways running down the Chumash Trail is more difficult than running up. It can be very challenging to run down a rocky, technical section of trail with any speed. Running a trail like the Chumash Trail can help develop the skill and strength necessary to do downhills with better technique and more speed.
I don’t think I’ve ever run this trail fresh, but a couple of times a year, when my legs feel good, it’s fun to really push the Chumash Trail up and down. Like most running, there’s a balance — push too hard on the up and there won’t be enough left to push the down.
Here is an interactive, 3D terrain view of the Chumash Trail Out & Back to Rocky Peak Road. The map can be zoomed, tilted, rotated, and panned using the navigation control on the right. Track and placename locations are approximate and subject to errors. Poor weather and other conditions may make this route unsuitable for this activity.
There are several ways to extend the basic out and back. One option is to turn left on Rocky Peak Road and run a mile to “Fossil Point.” Another is to turn right and run 1.6 mile to the Rock Peak overlook.
Low clouds spilling over Rocky Peak Road near the Chumash Trail.
Wait a minute… I stopped running down the hill and walked back to look at the sizable pile of scat.
I was on Rocky Peak Road, at about mile 3 of an extended version of the Chumash – Las Llajas loop, and just past the top of the Chumash Trail.
Bear scat on Rocky Peak Road. Click for a larger image.
No doubt about it. It was bear scat. The bear had been eating holly-leaved cherries, and the scat was full of cherry pits. Over several decades of running Rocky Peak Road, this was the first time I’d seen evidence of a bear in the area.
This morning, I looked for bear tracks around the scat, but thunderstorms and bike traffic had erased them. After taking a couple of photos, I continued toward the high point of the loop, “Fossil Point.”
Cairn at “Fossil Point” — the highest point of the Chumash – Las Llajas Loop.
What had started as a very foggy morning was transitioning to a cool Fall day with a mix of sun and clouds. From the cairn at Fossil Point, Oat Mountain was still partially shrouded by clouds. Below the overlook, I spotted a couple of mountain bikers working up the road. The ride up Las Llajas Canyon has become a popular e-mountainbike ride, and e-bikes would be the only type of bike I would see on my way down the canyon.
The run down Las Llajas Canyon was pleasant and fast-paced. Lately, I’ve been doing a variation of the loop that jumps over to the Marr Ranch Trail using a trail that splits off the Coquina Mine trail. This route gets you up and out of the canyon and onto a ridge with good views of the surrounding terrain. It’s a bit more adventurous and adds a little mileage and elevation gain to the usual loop. The Coquina Mine trail is easy to miss — it branches off Las Llajas Road after passing the towering cliffs.
I saw a flash of brown through the bushes on the trail ahead. I stopped as a deer emerged from a switchback. The doe was walking slowly up the trail with her mule-like ears turned back toward me. I said something like, “Where are you going?”
She turned toward me and stared quizzically. As I slowly pulled the phone from my pack, I continued to talk. Her expression was a mix of caution and curiosity. It was as if she couldn’t quite make up her mind what I was about.
Mule deer at Trippet Ranch
This was peculiar behavior for a deer in this area. It wouldn’t be so strange if I was at Trippet Ranch. The deer there graze around the oaks and grasslands near the parking lot and are used to seeing people. But in decades of running the Chumash Trail, I’ve only occasionally seen deer, and they have always been skittish and quick to react.
This doe watched me as I slowly walked around the bend and toward her. I was reminded of a friend’s experience, when he was hit on the shoulder by a spooked deer. Not wanting to force a reaction, I stopped. The deer casually stepped off the trail and disappeared down the ravine.
Later, running down Las Llajas Canyon, I was startled by the sound of something large moving in the brush. This time I got only a fleeting glimpse, as the deer bounded uphill through the trees, rocks, and brush.
Was that thunder? I warily eyed the dark clouds over the mountains and pondered the situation.
I was about halfway to the top of the Chumash Trail and was planning to run along the crest to Rocky Peak. The run had started in short sleeves and sunshine, but it was pretty obvious that wasn’t going to last.
Chumash Trail about a mile from the trailhead
A cold upper-level low had brought badly needed rain to the area for the past two days. The low was moving off to the east, but there was still a chance of afternoon showers and maybe even a thunderstorm.
It was the “thunderstorm” part that I needed to pay attention to. I had enough gear to deal with a downpour and cooling temps, but electrical storms are no fun at all.
I decided to continue to the top of the Chumash Trail and reassess. As I worked up the trail, I pictured the counterclockwise circulation around the low, and how convective cells develop over the mountains and then dissipate as they drift south. The concern was that the cells don’t always dissipate.
Rocky Peak Road near Rocky Peak
It looked like things weren’t getting any better at the top of the Chumash Trail, but it wasn’t worse either. I hadn’t heard any thunder for a while, and most of the activity seemed to be a few miles to the west and east. Having been starved of stormy weather for much of the rain season, I turned right on Rocky Peak Road and headed south toward Rocky Peak.
The run from the Chumash Trailhead to Rocky Peak is a challenging mix of technical single-track trail and hilly fire road. There are wide-ranging views of Simi Valley & Simi Hills, the San Fernando Valley, Santa Monica Mountains, Ventura County mountains, and San Gabriel Mountains. On a clear day, the view can extend to the Channel Islands, Saddleback, and San Jacinto Peak.
NOAA radar mosaic at the time I was on Rocky Peak
The actual turnaround point for a run to “Rocky Peak” varies. Some like to turnaround at the high point of Rocky Peak Road that is near Rocky Peak. Most of the time, I turnaround at a viewpoint that is at the end of a spur trail that branches off from the high point of Rocky Peak Road. From time to time, it’s fun to hike over to Rocky Peak and scramble to the top. That’s a bit more involved and requires some route-finding.
I felt the first raindrops as I reached the high point on Rocky Peak Road and turned onto the spur trail that leads to the overlook. There was some increased development to the east, but it looked like there would be enough time to get over to Rocky Peak, take a couple of pics, and then head back.
Oat Mountain, shrouded by rain
I felt a little exposed on top of Rocky Peak. I hadn’t heard any thunder for the past hour, but a cell to the east was spouting heavy rain over the San Fernando Valley, which meant there was probably enough development to produce lightning. I took the title photo and a couple of others and hurriedly descended from the peak.
Back on Rock Peak Road, the sprinkles increased, and the showers became more steady as I ran north toward the Chumash Trail. Under the dark clouds, a raven perched on a large pinnacle cawed incessantly, either enjoying the rain or complaining about it. In the distance, a siren wailed down in the valley. It was cold, and I was very glad to have an extra shirt, sleeves, gloves and a light rain shell.
Mix of sun and rain on the Chumash Trail.
As I began the descent of the Chumash Trail, the sun briefly broke through the clouds, reflecting brightly on the wet sandstone rocks. I breathed deeply, relishing the smell of the cleansed air and wet chaparral, and continued down the trail.
