Del Mar's Sea Cliff Trail Reopens This Month. It Won't Be the Last Time It Closes.

Sometime in the next two weeks, the fencing at Sea Cliff Park comes down. SANDAG's own project tracker, last updated July 23, 2026, still lists the park's southern section as closed "until the end of August," which means if you have been rerouting your walk along Coast Boulevard for the better part of a year and a half, the detour is almost over.

Before you file this under good news and move on, it is worth understanding what actually just happened to this stretch of bluff, because the trail closing was never really about the trail. It was about the railroad tracks running along the top of it, and that problem does not end when the fencing comes down.

The Closure Was Never About the View

Sea Cliff Park and its walking trail shut down on April 1, 2025, and the reason had nothing to do with pedestrian traffic. The City of Del Mar's own closure notice explained that crews needed the space to install an underground drainage pipe from the bluffs down to the beach, work the notice described as crucial to keeping the bluffs from eroding and keeping train passengers safe. This stretch carries the LOSSAN Corridor, the rail line connecting Los Angeles, San Diego, and San Luis Obispo, and the bluff beneath those tracks has been sliding toward the ocean for decades.

That is not an abstraction here. On March 11, 2026, a 75-foot by 75-foot section of bluff near 10th Street and Camino Del Mar gave way just before 8:30 in the morning. No one was hurt, but the collapse dumped rock and sandstone onto a stretch of sand usually crowded with off-leash dogs, and it followed a similar 25-foot-wide collapse between 9th and 10th streets in 2024. Earlier failures along this same corridor have shut down COASTER and other rail service while inspectors checked the tracks for damage. The park closure you have been walking around is one piece of a much larger, much older effort to keep that from happening again.

Four Times Since 2003

This is not the first time SANDAG has had to reinforce this exact piece of coastline, and it will not be the last. Since 2003, SANDAG and the North County Transit District have completed four separate stabilization projects along this stretch, installing more than 230 support columns in the process.

The Sea Cliff Park closure sits inside Phase 5. Work has included roughly 2,000 feet of new seawall along the bluff toe between Coast Avenue and Torrey Pines State Park, along with the concrete drainage channel that forced the park closure in the first place. The project has drawn attention well beyond the neighborhood, including a visit from Senator Adam Schiff amid the stabilization work.

Where Everyone's Been Walking Instead

With the trail closed, the daily loop most residents relied on simply moved. A few patterns held through the closure:

• Powerhouse Beach kept its public access point, so the walk down to the sand from Powerhouse Park never disappeared, it just became the default rather than one option among several.
• The stretch of Coast Boulevard past Seagrove Park stayed open for anyone who wanted the bluff-top view without the closed trail itself.
• Camino Del Mar's sidewalk corridor absorbed a lot of foot traffic that used to happen closer to the water.
• The informal route down to the beach at 11th Street, a dirt path locals had long called the goat trail, briefly stayed usable even after the park shut down. Pedestrians crossed the new drainage channel, then the tracks, then scrambled down the bluff face to the sand.

That last one did not last. SANDAG fenced off access from 11th Street for at least a year, and the agency's program project manager, Clint Peace, was direct about why.

"We do reiterate that this is an active construction site, and it's for the public's safety."

Fall protection still needed to go in along the highest point of the drainage channel, and until it did, the goat trail was off limits. It is a small detail, but it is the kind of thing that explains why so many regulars adjusted their routes twice during this closure instead of once.

What Reopens, and What Doesn't

When the fencing comes down at the end of August, you get the trail back, the same one that closed in April 2025. What you do not get is anything new. The pedestrian crossing at 11th Street, the formalized beach access, the connection between the bluff top and Seagrove Park that locals have informally patched together for years, none of that is part of this reopening.

That is a separate project, and it is still being figured out.

The Project Behind the Project

Back in 2023, SANDAG completed something called the Coastal Connections Conceptual Planning Study, which looked specifically at whether this stretch needed a formal pedestrian rail crossing and a real blufftop trail rather than the patchwork of dirt paths people have used for years. The findings became the basis for what SANDAG now calls the Del Mar Bluffs Access Improvements project, and it commits the agency to building three things: a new pedestrian railroad crossing at either 7th Street or 11th Street, a proper accessway from the bluffs down to the beach, and an enhanced blufftop trail running between 4th Street and Seagrove Park.

As of this spring and summer, SANDAG has been analyzing the feasibility of those 2023 recommendations and developing specific alternatives, according to the agency's own project page. Nothing has broken ground yet.

There is a longer horizon behind even that. SANDAG is also evaluating whether to move the railroad tracks off the bluffs entirely, a project the agency calls the LOSSAN Rail Realignment. That effort just entered its environmental review phase, meaning studies conducted under state and federal environmental law over the next several years, not a groundbreaking anyone should expect soon. If it eventually happens, it would be the first time in more than two decades of patch-and-repair work that the underlying problem, tracks sitting on a bluff that keeps eroding, actually gets solved instead of managed.

What This Means for Your Next Walk

Here is the part worth sitting with. The trail reopening this month is not the end of construction on this stretch, it is a pause between projects. The pedestrian crossing study is still working through alternatives. The rail realignment review is just getting started. Anyone who has lived here through this closure and adjusted their route twice should expect at least one more adjustment somewhere down the line, whether that is a new crossing at 7th or 11th Street, a rebuilt connection to Seagrove Park, or eventually a rail line that has moved somewhere else entirely.

For now, the walk you remember comes back at the end of August. SANDAG posts updates on its Del Mar Bluffs Stabilization page as work progresses, and it is worth a bookmark if you want to know before the fencing goes back up again, because on this stretch of coast, it usually does.

If you are new to the neighborhood and still learning which closures are permanent and which ones are just this year's version of an old problem, that is the kind of local detail Katie Nelson + Associates tracks as a matter of course. Reach out any time you want a longtime resident's read on what is actually happening in Del Mar, not just what the signage says.