If you walk or ride the Cross Kirkland Corridor between NE 52nd Street and 108th Avenue NE, you've seen it: a fat, above-ground pipe running along the west side of the trail for the better part of a mile, fenced off, unremarkable enough that most people stop noticing it after the third or fourth pass. It has the look of something a construction crew forgot to haul away. It is not that. It is one of King County's regional sewer trunk lines, rerouted onto the surface because the actual pipe underground needed emergency repair, and as of this writing it is still there because the ground beneath it needs work too.
That distinction matters if you use this trail regularly, because it explains a full year of closures that otherwise read as random.
What's actually under the corridor
The Cross Kirkland Corridor is a 5.75-mile former rail line that the city converted into a crushed-gravel path connecting South Kirkland Park and Ride to Totem Lake, and it doubles as the first completed stretch of the 42-mile Eastrail network that will eventually link Renton to Snohomish County. Most people who use it know that history in outline. Fewer know that a King County wastewater pipe called the Eastside Interceptor Section 14, seven feet in diameter and carrying an average of 10 million gallons of wastewater a day in dry weather, runs directly beneath a portion of the trail.
In late July 2025, King County and City of Kirkland crews found that pipe leaking into a piped stream Kirkland maintains alongside it. Public Health, Seattle and King County was brought in and determined there was no public health risk, but the leak itself was serious enough that King County's Department of Natural Resources and Parks issued a formal Declaration of Urgency that September to fast-track repairs, and the City of Kirkland followed with its own Proclamation of Emergency to support the work. That's not routine maintenance language. That's the language counties use when a piece of critical infrastructure needs to be fixed faster than the normal permitting timeline allows.
The bypass, and the closures you actually lived through
To keep sewer service running to homes and businesses while crews repaired the pipe underground, they built a temporary 3,000-foot, 18-inch diversion pipe and ran it above ground along the trail's west side. That's the object you've been walking past.
The closures that followed track the repair, not the calendar:
- The trail closed as early as January 5, 2026, between NE 52nd and 108th, so crews could divert wastewater into the temporary pipe and work on the section underneath.
- Before that, in December 2025, King County found a natural pause in construction and reopened the section for about two weeks, timed in part so the annual Christmas 12K run could use the trail safely.
- The trail reopened again on February 23, 2026, once the underground joint repairs to ESI-14 were finished.
- It closed once more, briefly, on March 24, 2026, so crews could test soil conditions ahead of a bigger phase of work.
If you experienced this as a string of unrelated inconveniences, that's understandable. Read end to end, it's one project with a single cause, executed in stages because you can't take a regional sewer line fully offline just because the trail above it would be easier to work on if you did.
Why the pipe is still visible this fall
Here's the part that explains what you're seeing right now. When King County reopened the trail in February, it was explicit that the temporary above-ground pipe would stay in place through the summer, because a rockery wall and culvert sitting beneath the county's pipe still needed to be stabilized and repaired. The access points from that work were covered with steel plates and fenced off in the meantime, which is the fencing you've likely walked past all summer.
That means the pipe running beside the trail isn't a leftover. It's a placeholder doing real work, keeping sewer service flowing to the homes and businesses connected to that line while a separate, structural repair happens underneath it. Once the rockery and culvert repairs are complete, King County has said the equipment comes out and new trees go in along that stretch. If you're heading out for a fall walk or ride on the CKC and still see the pipe, that's the rockery work finishing up, not a new problem.
The trail underneath the story
It's worth sitting with what this says about the corridor itself, because it's easy to think of the CKC as a recreational amenity and forget it was built on top of, and now depends on coexisting with, some of the region's oldest infrastructure. The trail runs past Feriton Spur Park, developed by the city in a public-private partnership with Google, whose Kirkland campus surrounds the park roughly halfway along the route. It threads through light industrial stretches near Totem Lake, ducks under I-405, and slips back into tree cover south toward downtown. All of that sits directly above a sewer main built to move ten million gallons a day. The trail and the pipe were never separate projects. They share a right of way, which is exactly why a leak in one shows up as a closure in the other.
What this means for your next walk
For residents planning fall routines on the corridor, a few practical notes worth carrying with you:
The trail itself is flat, wide, and unpaved gravel for its full length, which makes it one of the easier walking and biking routes in Kirkland regardless of what's happening with the pipe. Dogs are welcome on leash. If you're coming from downtown, Marina Park's Wednesday Market runs through September 30 this year, so a Wednesday afternoon still gives you the option to end a CKC walk with a stop at the market before it closes for the season. If you're headed north toward Totem Lake, expect to still see the fenced-off access points and the above-ground pipe along the NE 52nd to 108th stretch until King County confirms the rockery and culvert repairs are done and the equipment comes out.
None of this changes how good the trail is to use. It changes how you read what you're looking at when you use it, and that's worth knowing if you're going to be walking past that pipe for a few more weeks anyway.
If you're weighing a move onto or off the corridor, or just want a neighbor's read on how a property near it stacks up, Stanford Group knows this stretch of Kirkland well enough to talk through it in plain terms. Reach out anytime for a personalized market and renovation consultation.
