LA–Long Beach Rail Backlog Nears 35,700 Containers, Turning Port Arrival Into a New Inland Freight Risk

Nearly 35,700 import containers were waiting for on-dock rail service at the Ports of Los Angeles and Long Beach in the latest late-October readings, a sign that one of the most important U.S. import gateways is now facing its most acute reliability problem after cargo is already ashore. Public dashboard data compiled from the two ports show 19,626 rail-bound import containers waiting at Los Angeles on October 26, 2026 and 15,883 at Long Beach on October 27, 2026, for a combined 35,509 units awaiting train loading or movement inland. That closely matches the roughly 35,700-container figure reported on October 28, 2026 by FreightWaves. The practical implication is straightforward: port arrival is becoming a false milestone for freight that still depends on rail capacity to reach inland destinations.

The backlog is real — and it is concentrated in rail-bound imports

The figure is not a generalized estimate of all container congestion. It is a count of import containers awaiting on-dock rail service at the two ports, drawn from the Port of Los Angeles Cargo Operations Dashboard and the Port of Long Beach rail-dwell reporting referenced by The Dwell’s public aggregation of the port dashboards. In Los Angeles, the port’s operations page describes this dataset as “import on-dock rail” and “rail containers awaiting loading,” updated each business day. Long Beach publishes a comparable rail-dwell view through its CargoNav tools, and the latest public readings show the same pattern: a large buildup of containers already discharged from vessels but not yet moving inland by train.

That distinction matters. A container can be offloaded from a ship and still remain unavailable for time-sensitive factory replenishment, distribution-center intake, or project delivery if rail loading slots, railcars, or inland network capacity are constrained.

Record September volumes set up the October strain

The rail backlog is building on top of an unusually strong cargo run through Southern California. The Port of Los Angeles said on October 9 that it handled 1,042,652 TEUs in September 2026, the busiest month in its 118-year history. Loaded imports alone reached 545,696 TEUs, up 19% year over year, and the port said July through September was its busiest quarter ever.

Long Beach also posted a record month. Trade coverage citing port officials reported that the Port of Long Beach moved 997,177 TEUs in September, its busiest month in 115 years. The Pacific Merchant Shipping Association likewise said Long Beach celebrated its busiest month in history in September.

Together, that means the San Pedro Bay complex handled just over 2.0 million TEUs in September, a very large pulse of cargo for a gateway where a meaningful share of imports must move inland by intermodal rail rather than local truck.

Dwell times had already been worsening before this week’s count

The late-October box count did not emerge out of nowhere. Rail dwell for import containers at the San Pedro Bay ports had already been climbing for weeks. In August, average rail-bound import dwell at Los Angeles and Long Beach rose to 6.75 days, up from 6.34 days in July, according to reporting on Pacific Merchant Shipping Association data. By September, rail dwell climbed again to 7.19 days, versus 3.18 days for truck-bound cargo, according to Supply Chain Dive’s report on PMSA data and comments.

PMSA Senior Manager of Public Affairs Natasha Villa said in that October reporting that “September was a record-setting month for the Ports of Los Angeles and Long Beach, and the higher dwell times reflect the sheer volume of cargo moving through the complex, with rail dwell continuing to be the area of greatest pressure.” That is the clearest public explanation so far from an industry group close to terminal conditions: the biggest stress point is not basic vessel discharge, but the handoff from terminal to inland rail.

The latest terminal-level counts reinforce that message. According to The Dwell’s compilation of the ports’ public dashboards, 8,133 of Los Angeles’ 19,626 waiting rail containers had been there 9 days or longer, while 3,450 of Long Beach’s 15,883 had also crossed the 9+ day threshold in the latest readings. That aging profile is what turns a congestion headline into a service-risk story.

What appears to be driving the problem

The public record supports several contributing factors, though not every root cause has been quantified by the railroads or terminal operators.

First, there is the basic volume effect: September was a record month for both ports, and the National Retail Federation said the 2026 peak season stayed elevated longer than expected. In its October 8 Global Port Tracker release, NRF and Hackett Associates projected 2.28 million TEUs of imports for U.S. ports in September and 2.25 million TEUs in October, showing that import demand remained high even as the normal peak should have been easing.

Second, multiple market observers have pointed to equipment and intermodal capacity constraints rather than a simple marine-side breakdown. FreightWaves’ October 28 report tied the Southern California buildup to record cargo volumes and railcar shortages, while C.H. Robinson’s October drayage update said railcar shortages are extending import dwell time at the ports of Los Angeles and Long Beach and slowing container movement inland.

Third, broader rail network fluidity remains only mixed. The Surface Transportation Board’s rail service data portal shows weekly Class I service metrics, including terminal dwell, but those figures are systemwide rather than specific to San Pedro Bay port moves. BNSF’s most recent public intermodal network update from October 23 also referenced recovery from weather-related interruptions on key western lines, including the Needles Subdivision between Needles and Barstow and a derailment-linked disruption on the El Paso Subdivision in southern New Mexico. Those notices do not directly explain the port backlog, but they show that inland rail operations were not running in a perfectly frictionless environment as the box buildup worsened.

What remains unclear is the exact split between pure railcar scarcity, train-start limitations, inland ramp congestion, terminal staging constraints, or service-design issues by corridor. Neither BNSF nor Union Pacific appeared to have issued a detailed public explanation specific to this late-October LA-Long Beach on-dock import backlog as of October 28.

Why this matters more than a normal port-congestion story

The most important change for import planning is conceptual: arrival at the port is no longer a reliable proxy for inland availability.

For cargo moving to the Midwest, Texas, inland California, or large rail-served distribution corridors, the ocean leg may be complete while the operational risk is still ahead. A rail-bound container sitting a week or more on terminal can trigger missed DC appointments, order-cycle slippage, labor rescheduling, and higher exposure to storage, detention, or demurrage depending on contract structure and terminal free-time conditions.

That risk is especially relevant for manufacturers, industrial distributors, and project-driven operations that often plan around production windows rather than retail shelf dates. If procurement teams or plant schedulers treat vessel discharge as the moment freight is effectively “here,” late-stage inland delays can create false confidence in maintenance outages, line-start dates, or inventory availability.

The spillover risk is inland, not just local

This is still a Southern California gateway problem, but it is unlikely to stay neatly contained there. Los Angeles and Long Beach are a major launch point for inland point intermodal flows to destination ramps across the Southwest, Texas, Chicago, Memphis, Kansas City, and other interior markets. When thousands of import boxes stack up waiting for trains at origin, the effects can migrate outward through drayage scheduling, transload demand, destination-ramp planning, and warehouse labor assumptions.

The port complex had already shown signs of this widening pressure in September. Port of Los Angeles Executive Director Gene Seroka said in the port’s September briefing that the speed of moving cargo through Los Angeles and onto rail can materially influence importer routing economics versus other gateways. That observation cuts both ways: when rail fluidity deteriorates, the gateway’s inland value proposition also weakens.

What importers are likely to do next

If this backlog persists into November, several response patterns are likely.

1. More transload and truck conversion

Some shippers will choose to pull freight off the marine terminal and convert inland moves to truck, especially for urgent replenishment or high-cost stockouts. That will raise costs, but it can be cheaper than extended delay for critical freight.

2. More conservative milestone tracking

Operations teams may need to stop treating “arrived port” as a dependable ETA proxy and instead manage to milestones such as available for rail loading, loaded to train, or arrived destination ramp.

3. Earlier booking of inland capacity

Where service contracts allow it, rail bookings, drayage reservations, and transload fallback plans will need to be set earlier, particularly for freight tied to fixed customer appointments or industrial shutdown windows.

4. More gateway diversification discussions for 2027

With transportation budgets and routing guides being set now, repeated Southern California rail disruption strengthens the case for at least partial diversification by gateway, inland routing, or inventory position — even if LA-Long Beach remains the lowest-cost port pair on paper.

A sharper follow-up to September’s rail-delay warnings

The new element in late October is not merely that rail delays exist. It is that the problem is now visible in a large, concrete on-dock inventory count at the nation’s biggest container gateway. In September, the warning sign was rising dwell time. By October 28, the warning had turned into a backlog of roughly 35,700 containers waiting for on-dock rail service, supported by public port data and a growing share of boxes aging beyond nine days.

That is a more consequential signal because it points to a failure point after vessel arrival, not before it. For import-dependent supply chains, that changes how lead times, ETAs, and inland handoffs should be judged for the remainder of 2026.

For readers planning freight through Southern California, this is the kind of disruption that can affect factory inputs, project schedules, and distribution timing even when ocean transit appears to be on plan. CAP Logistics is monitoring these inland execution risks closely and can help customers pressure-test alternate routings, transload options, and milestone assumptions when rail-dependent imports are moving through constrained gateways.