Journal

The Del Mar bluff rail move: what property owners actually need to track

Written by Sofia Azizi, CA DRE# 02108624 · Updated 2026-07-30

SANDAG plans to take the coastal tracks off the Del Mar bluffs and underground — a project measured in billions of dollars and ownership cycles, with no route yet chosen. The milestones that turn general concern into parcel-specific fact, for owners on the bluff and away from it. Revised as milestones land.

What is actually planned for the Del Mar bluff rail line?

SANDAG’s LOSSAN Rail Realignment would move the 1.7-mile segment of coastal track that runs atop the Del Mar bluffs into a tunnel inland, replacing the corridor’s most fragile stretch — the project is in environmental review, and no route has been selected.

The stretch matters beyond Del Mar: the LOSSAN corridor is among the busiest intercity passenger rail corridors in the country, and the bluff segment is its chokepoint — eroding, single-tracked, and periodically closed for emergency stabilization. SANDAG’s rail realignment project pages are the official record, and the claims worth acting on all live there.

Which tunnel routes are under study in Del Mar?

The alternatives SANDAG has published for the Del Mar realignment differ in where the tunnel runs — one tracks Interstate 5 with the longest tunnel, one runs more directly beneath Del Mar itself, and one keeps the shortest tunnel closest to the coast — with published cost figures in the billions per alignment.

The under-town options are what put easements on the community’s agenda: a tunnel passes beneath somebody’s parcel, and which parcels is exactly what route selection decides. Route selection is therefore the milestone that converts general concern into parcel-specific fact — and the public comment windows SANDAG runs before it are the point of influence, not the construction hearings years later.

When would trains actually leave the Del Mar bluffs?

Published planning for the Del Mar realignment points at completion in the mid-2030s, with environmental work and route selection still ahead of construction — a horizon measured in ownership cycles, not escrow periods.

The near-term reality is the opposite of the long-term plan: continued stabilization work on the existing bluff alignment to keep it running until a replacement exists. Both timelines are trackable — SANDAG for the realignment, the City of Del Mar’s project repository for bluff work — and any specific completion year deserves to be treated as provisional until a route is chosen and funded.

What should bluff-area Del Mar owners watch?

For Del Mar owners near the bluffs, the near-term facts are stabilization construction on the existing track and, on the long horizon, the question of what replaces the rail corridor after trains move — access, trails and slope work all route through the city’s and SANDAG’s published project records.

Construction windows, staging areas and closure schedules are published facts, not rumors to trade on — and a transaction near the corridor is better served by citing them than by either catastrophizing or waving them off. The Del Mar guide carries the community-level picture, coastal-zone rules included.

Does the rail project matter for Del Mar homes away from the bluff?

Del Mar homes nowhere near the bluff still intersect the rail project through route selection: an inland tunnel passes beneath somebody, and easement, vibration and staging questions attach to the chosen alignment rather than to the coastline.

Until a route is selected, the parcel-specific answer does not exist — which cuts both ways: no inland parcel can claim immunity, and none should be discounted on speculation. The actionable habit is unglamorous: know which alternatives touch which parts of town, and use the comment windows while the decision is still open.

Project facts above are from SANDAG’s published LOSSAN Rail Realignment materials and the City of Del Mar’s project pages as of July 2026; alignments, costs and dates are provisional until a route is selected and funded. This page is revised as milestones land.

Published 2026-07-30