The paved turnout where I usually park at the Stunt Road trailhead was covered with mud, rocks, and debris. And near the entrance of Calabasas Peak fire road, two large boulders had been dragged to the shoulder to clear the road.
Following another big storm in a Winter of big storms, I was doing the Topanga Lookout Ridge Loop — curious to see what I could see. Nearby Stunt Ranch Reserve had recorded over 10 inches of rain the past three days, and there had been numerous reports of low elevation snow.
Upper Santa Ynez Canyon and Eagle Rock from East Topanga Fire Road
The view from Parker Mesa Overlook was the uniform gray of the inside of a cloud. I was about 30 minutes too early, and the low clouds hadn’t cleared. The Pacific Ocean was out there somewhere.
Even so, the run from the Top of Reseda to the Overlook had been excellent. The hills and canyons were painted in a muted palette of sun and shadow. Purple-pink prickly phlox brightened the roadside, and the “Beech-nut Gum” scent of Bigpod Ceoanthus filled the air.
Prickly phlox along East Topanga Fire Road
Fire Road #30, Eagle Springs Fire Road, and East Topanga Fire Road had all been cleared of the sluffs and slides that resulted from January’s rainstorms. Overnight, there had been a little drizzle, but the fire roads hadn’t been muddy at all.
Rather than just retracing my steps, on the way back to the Top of Reseda I opted to do the Musch and Garapito Trails. I had run the Garapito Trail in mid-January but hadn’t been on the Musch Trail since the January deluge.
The Trippet Ranch parking lot had been packed, and several groups appeared to be on their way to Eagle Rock via the Musch Trail. Overall, the trail weathered the storms reasonably well, but one badly eroded section and a couple other spots will need some work.
Damaged section of the Musch Trail
While it still had some issues, use of the Garapito Trail had moderated its condition since the last time I was on it. Some brush that had blocked the trail had been removed, and paths were evolving through the collapsed sections of trail. However, some extra care was still required in some spots.
The Bent Arrow Trail was closed, necessitating a return to dirt Mulholland on Fire Road #30, following the same route as had been used at the beginning of the run.
Here is an interactive, 3D terrain view of a GPS track (yellow) to Parker Mesa Overlook from the Top of Reseda. The Bent Arrow Trail is temporarily closed for repair and is shown in red. To change the view, use the control on the upper right side of the screen. Track and placename locations are approximate and subject to errors. Poor weather and other conditions may make this route unsuitable for this activity.
April 26, 2023 Update. As it turns out, the shiny, new bridge on the Crags Road Trail that made it easy to cross Malibu Creek was not washed away! According to the Malibu Creek Docents, the bridge was designed to be portable, and was removed and stored before this Winter’s rain. It is expected to be reinstalled when the threat of flooding is over — which should be soon.
I was just a couple of miles into an extended version of the Bulldog Loop. The temperature was in the mid-30s, and once again, I was having to cross Malibu Creek on a makeshift bridge of wobbly limbs and debris.
Flood debris on the Crags Road Trail
The flood was the result of a series of three increasingly wet storms between December 30 and January 10. During that period, the Malibu Canyon RAWS recorded about 13 inches of rain. In the last storm of the series, 6 inches of rain was recorded in about 33 hours.
The flooding along the Crags Road Trail from the Forest Trail junction to the M*A*S*H site was similar to the February 2017 and December 2021 events. In the January 2023 event, more debris was deposited on the trail, and sections of the trail were obliterated. That stretch of trail is popular, and a new use trail is already taking shape.
Rainfall and runoff were even higher in Santa Barbara and Ventura Counties. The Rose Valley RAWS recorded over 22 inches of rain for the three storms. According to preliminary streamflow data, the Ventura River Near Ventura reached a new record stage height of 25.42 feet on January 9. The Sespe Creek Near Fillmore gage malfunctioned at the peak flow but reached at least 20.38 feet.
Continuing the theme of checking out local trails following the December 2022 – January 2023 series of rainstorms, this morning I did a trail run/hike from the Wendy Drive Trailhead in Newbury Park.
Vernal stream on the Chamberlain segment of the Backbone Trail
I was able to check out several trails — and get in a little climbing — by doing Sandstone Peak via Boney Mountain’s Western Ridge and Tri Peaks and then returning by way of the Backbone Trail, Big Sycamore Canyon, and the Upper Sycamore Trail.
The surprising headline is that the trails on this route held up better than expected. Although there was a lot of rain, the rain rates in this area must not have been excessive. Generally, it looked like streams were able to handle the runoff.
It didn’t come out of it unscathed, but the Blue Canyon segment of the Backbone Trail was less damaged than usual. Some route-finding through the cobble was required, but a new use trail was already starting to emerge. I was also surprised to see that several oft-repaired sections of the Upper Sycamore Trail were mostly intact. There was a lot of creek hopping on these trails, but it was good to hear the burble and gurgle of the rejuvenated streams.
Section of the Old Boney/Backbone Trail repaired by the SMMTC that withstood the Dec 2022 – Jan 2023 storms.
Work done by the Santa Monica Mountains Trails Council prevented additional damage. In the past, a section of Old Boney segment of the Backbone Trail between the Chamberlain Trail junction and Blue Canyon has always had significant problems following rainstorms. Water would run down the trail, eroding ruts and exposing rocks. In one place, most of the trail had collapsed into the canyon. Thanks to the SMMTC, I ran it today without a second thought. A steep section of the Backbone Trail above Chamberlain Rock, repaired by the SMMTC, also held up well.
Speaking of which… As I was running down the Chamberlain Trail, I’d noticed some shoe tracks that were also headed down. This was a bit odd because there weren’t any tracks coming up. The puzzle was solved when I caught up to three hikers near Chamberlain Rock. They had also done the Western Ridge of Boney Mountain and were going to complete the loop via Sycamore Canyon.
Here is an interactive, 3D terrain view of a GPS track (yellow) to Sandstone Peak from Wendy Drive via Boney Mountain’s Western Ridge and Tri Peaks, then returning via Big Sycamore Canyon and the Upper Sycamore Trail. Two alternate routes are also shown (red). To change the view, use the control on the upper right side of the screen. Track and placename locations are approximate and subject to errors. Poor weather and other conditions may make this route unsuitable for this activity.
Several popular trails and fire roads in Topanga State Park have been damaged by the cumulative effects of Winter 2022-2023 rainstorms.
Since December 1, 2022, the Topanga Remote Automated Weather Station (RAWS) has recorded nearly 16 inches of rain. The most rainfall occurred January 9-10, when about 5.4 inches was measured.
On Sunday, January 15, I did an exploratory trail run from the Top of Reseda that took me through some popular areas of the Park. This included Fire Road #30, the Hub, Temescal Peak, Temescal Lookout, Temescal Ridge Fire Road, Eagle Springs Fire Road, Eagle Rock Fire Road, the Garapito Trail, and the Bent Arrow Trail.
There were numerous mudslides on the fire roads. The larger slides were on Fire Road #30 below the Hub and Temescal Ridge Fire Road between the Backbone Trail junction and Temescal Lookout. There was also significant roadbed and shoulder erosion in places. At the time, all were passable on foot.
The Garapito Trail was blocked in two places on the upper part of the trail. One problem was from a sluff of soil and brush sliding onto the trail. The other was from the collapse of a section of trail. There were additional sluffs, limbs, and washouts on the trail that were passable at the time.
Update February 5, 2023. The Bent Arrow Trail is closed. Fire Road #30, Eagle Springs Fire Road, and East Topanga Fire Road to Parker Mesa Overlook had all been cleared. The Musch Trail was eroded in spots but OK. Use of the Garapito Trail has moderated its condition. Some brush had been cleared and paths have evolved through the sections of collapsed trail. Extra care is required in some spots.
Other trails and fire roads in Topanga State Park likely had similar impacts. I would expect, like last year, sections of the Santa Ynez Trail lower in the canyon to be washed out.
