Just before 8:30 in the morning on March 11, a chunk of sandstone the size of a small house let go along the Del Mar bluffs. Rock, sand, and broken cliff face dropped onto the shoreline near the stretch beachgoers call Dog Beach. Sheriff's deputies and California State Parks officials got the call within minutes. A Del Mar Fire Department battalion chief later put the collapsed section at roughly 75 by 75 feet. K9 teams searched the debris. Nobody was hurt. By 6:38 that morning, the scene was marked under control, caution tape up, the rubble left to settle where it fell.
If you've walked this coastline for any length of time, a collapse like that doesn't feel like a surprise so much as a reminder. Bluff failures here follow storms the way thunder follows lightning. A 25-foot section gave way between 9th and 10th streets in 2024. Before that, other collapses shut down COASTER service while inspectors checked whether the tracks above were still safe to run trains on.
What's easy to assume, standing on the sand and looking up at a hillside that's had crews on it for three summers running, is that the March collapse and the construction are the same story. They are not. And understanding why they're not tells you more about what's actually coming to this coastline than any of the individual updates do on their own.
Two projects, one hillside
SANDAG is currently running two separate efforts along the same 1.7 miles of bluff between 15th Street and the bridge at North Torrey Pines Road. They get talked about as one thing because they share a work site. They do not share a purpose, a funding source, or a timeline.
| Bluffs Stabilization (Phase 5) | Bluffs Access Improvements | |
|---|---|---|
| What it does | Installs support columns, extends seawalls, and improves drainage to protect the rail corridor from collapse | Studies whether to build a pedestrian undercrossing or a bluff-top trail so people stop walking the tracks to reach the sand |
| Funding | Roughly $88 million, funded and under construction | Still in feasibility analysis, no construction budget attached yet |
| Status as of September 2026 | Active. Periodic seawall work continues through this summer, and Sea Cliff Park's southern section was closed for construction through the end of August | In progress. Alternatives are being analyzed through summer 2026, with public outreach expected in fall and winter 2026 |
| Timeline | Spring 2024 through 2027 | 2023 planning study complete. No construction date set |
The stabilization work has been underway since spring 2024 and traces back to four earlier phases going as far as 2003, when SANDAG and North County Transit District began installing what is now more than 230 support columns along this same corridor. Its entire purpose is the railroad. The Del Mar bluffs carry the LOSSAN line, the passenger and freight corridor linking San Diego County to the rest of the state, and the columns and seawalls going in now are there to keep the tracks from sliding into the ocean during an earthquake or a wet winter. That project would exist whether or not a single pedestrian ever set foot on this beach.
The access project exists because pedestrians do. For years, the only way to get from the street to the sand along significant stretches of this corridor has been to walk directly onto the railroad right of way, the same tracks the stabilization project is reinforcing. That created enough of a safety problem that the California Coastal Commission made it a condition of approving the stabilization work in the first place. SANDAG had to agree to study a real crossing before regulators would sign off on shoring up the tracks above it.
Why the March collapse didn't move anything faster
It's tempting to read the Dog Beach collapse as the event that finally forces a decision on pedestrian access. It isn't going to work that way, and the reason is worth sitting with. The stabilization project and the access project run on different clocks because they answer to different mandates. One is an engineering response to erosion and seismic risk on a rail line. The other is a planning study that has to weigh an undercrossing against a bluff-top trail, price out each option, and run it past the City of Del Mar, North County Transit District, Caltrans, and the Coastal Commission before anyone breaks ground.
SANDAG completed its initial access study, called the Coastal Connections Conceptual Planning Study, back in spring 2023. More than three years later, the agency is still in the feasibility phase, sorting through which alternative can actually work along a corridor this narrow. Public outreach on those alternatives isn't expected until fall or winter of this year, and that outreach period is still a step before any design gets picked, let alone funded or built.
So the honest version of the story is this: the tracks are getting safer for trains at a steady, funded pace. The path for people is still an open question with no construction date attached to it. A collapse near Dog Beach doesn't change either timeline. It just makes the gap between them more visible for a few news cycles.
What's actually open right now
For anyone walking this stretch this fall, the practical picture looks like this:
- Sea Cliff Park's southern section was closed for construction through the end of August, and whether it stays open from here depends on how the rest of the stabilization schedule unfolds
- Seawall and drainage work near the beach itself is expected to continue through the rest of this summer, meaning fencing and equipment will still be part of the view for a while
- Powerhouse Park and Seagrove Park, just above the 15th Street surf break, remain open and are still the most complete access points on this end of the beach, each with parking, restrooms, and lawn space
- The 15th Street break itself, one of the only reef breaks between La Jolla and Cardiff, hasn't been touched by any of this work
- Crest Canyon's trails on the inland side of Del Mar are unaffected and remain a separate option for anyone looking to walk without dealing with beach construction at all
None of that is a workaround SANDAG is proud of. The agency's own project language is blunt about it: entering the railroad right of way to reach the beach creates safety concerns for pedestrians and for the trains running through, which is precisely the condition the access study was ordered to fix.
The takeaway if this is your stretch of coast
The neighborhood habit here has always been incremental. The city widened the driveway behind the 20th Street lifeguard tower a couple of summers back, a small, unglamorous fix to a real bottleneck. The bluffs have been getting reinforced in phases since the early 2000s. Nothing about how Del Mar handles its coastline moves in one dramatic step. It moves in overlapping projects that don't always share a finish line.
What that means concretely is that the fencing and equipment that have shown up along this stretch all year are doing their job as scheduled, and none of it has anything to do with whether a safer way to cross to the sand shows up next year. If you want a say in what that crossing eventually looks like, an undercrossing or a bluff-top trail, the window is the public outreach period expected this fall and winter, not some later ribbon-cutting. That is the actual moment this becomes a conversation instead of a construction notice.
The rest of the beach, from Powerhouse Park down through the reef break at 15th Street, is exactly where it's always been. The bluffs are getting safer for the trains running above it. Getting yourself down to the sand safely is still, for now, a separate problem waiting on its own timeline.
If you're thinking about what a changing coastline means for a property you already own here, or for one you're watching from a distance, Stacy Smith Properties knows this stretch of North County well enough to talk it through in plain terms. Let's Connect.
