Right now, driving through downtown Issaquah means picking a lane around two separate construction zones that happen to be closing at almost the same time the city's biggest weekend of the year opens up. That is not a coincidence anyone planned. It is just how the calendar landed in 2026, and if you live here, it is worth understanding the order these things happen in rather than treating them as one long blur of orange cones and street closures.
West Sunset Way has been under a staged closure since August 1, with the city's traffic alert listing the project running through September 30. The more disruptive phase, a full closure with a detour routed through Mt Olympus Drive SW and Mountain Park Boulevard SW, is meant to give way to a partial closure with flagger assistance as the work wraps up later in September. Meanwhile, out past May Valley, King County's Fifteen Mile Creek Bridge on SE May Valley Road has been closed to everyone, including pedestrians and emergency responders, since June 15. That closure is scheduled to lift at 11:59 p.m. on August 25, ten weeks after it started, on a 1932 timber bridge that crews determined could no longer be safely patched.
So two of Issaquah's longer-running detours are closing out within about a month of each other, right as the Issaquah Farmers Market counts down its final Saturdays at Pickering Barn and the Salmon Days Festival gets ready to close a much larger stretch of downtown on its own terms. Here is what that actually looks like week to week.
A quick map of what changes and when
| Date | What's happening | What it means downtown |
|---|---|---|
| Aug 25 | Fifteen Mile Creek Bridge reopens on SE May Valley Road | Ten-week closure near Issaquah-Hobart Road SE ends |
| Aug 29 | Metro Route 215 launches; Farmers Market at Pickering Barn | New all-week transit link plus market Saturday |
| Sept 5, 12, 19 | Farmers Market Saturdays continue | Regular 9 a.m. to 2 p.m. market hours |
| Sept 19 | Issaquah Alps Trails Club restoration event at Park Pointe | Volunteer blackberry removal ahead of fall tree planting |
| Sept 26 | Final Farmers Market Saturday, with an Art Commons Creative Summit | Last normal market day before October |
| Sept 30 | Target completion for West Sunset Way project | City aims to have work finished |
| Oct 3 to 4 | Salmon Days Festival, 57th annual | Front Street and Sunset Way closed 8 a.m. to 7 p.m. both days |
None of this cancels the others out. It stacks.
A new bus route lands in the middle of the mess
Somewhat buried in a regional transit advisory is a detail worth knowing if you have been avoiding downtown by car this month: King County Metro is adding Route 215 on August 29, an all-week connection linking Issaquah, North Bend, Snoqualmie, and Mercer Island Station. It is easy to miss because the announcement showed up on Bellevue's traffic advisory page rather than anywhere Issaquah-specific, but the timing lines up with the exact stretch when West Sunset Way is hardest to drive through. If you commute toward Mercer Island or I-90 and have been white-knuckling the detour through Mountain Park Boulevard, this is the moment a transit alternative actually shows up, not six months later once the construction dust has settled.
Five more Saturdays before the market gives way to the festival
The Issaquah Farmers Market runs 9 a.m. to 2 p.m. Saturdays at Pickering Barn through September 26. Counting from today, that is five Saturdays left this season: August 29, September 5, 12, 19, and the closer on the 26th. The last one is not just the final market of the year. It also features a Creative Summit hosted by Art Commons, with a social hour, show and tell, and two workshops running from 9:30 a.m. to 12:30 p.m. alongside the regular market booths. If you have been meaning to make it a full morning rather than a quick produce run, that Saturday is the one built for it.
There is a reason to treat these five Saturdays as their own small season rather than folding them into "market as usual." After September 26, the next big public gathering downtown is Salmon Days, and Salmon Days does not share a footprint with a Saturday morning market. It takes over Front Street and much of Sunset Way for two full days, artist booths and all. The market's low-key final stretch is the last version of a normal Issaquah Saturday before the city's largest event resets what normal looks like for one weekend.
If you want a quieter outdoor option during this stretch, the Issaquah Alps Trails Club is hosting a restoration event at Park Pointe on September 19, pulling invasive blackberry ahead of fall tree planting as part of the city's tree canopy goals. It is volunteer work, not a hike, but it is a reminder that not every fall Saturday here has to route through downtown traffic.
What actually closes for Salmon Days, and why the route matters
The 57th annual Salmon Days Festival runs October 3 and 4, and the road closures are more specific than "downtown is busy." Front Street from Newport Way to Gilman Boulevard and Sunset Way from Newport Way to Second Avenue SE close both days, with streets shutting at 8 a.m. and reopening at 7 p.m.
The parade on Saturday has its own timeline inside that window. Road closures for parade staging begin at 9 a.m., with the parade itself starting at 10 a.m. from Confluence Park. From there it proceeds down Rainier Boulevard North, turns onto NW Dogwood Street, then heads north on Front Street before turning onto the south side of NE Gilman Boulevard, ending at a dispersal area by Boehm's Candies. That last detail is a useful landmark if you are trying to picture the route: Boehm's has been making chocolate on NE Gilman Boulevard since Julius Boehm moved his shop there in 1956, and the parade's final stretch runs right past it.
The Issaquah Salmon Hatchery stays open through the festival, and while the guided tours pause for the weekend, docents from Friends of the Issaquah Salmon Hatchery are stationed throughout the grounds to answer questions as chinook and coho return to spawn. The pedestrian bridge over Issaquah Creek is typically the busiest single vantage point in town those two days, which is worth knowing if you are trying to time a quieter visit.
The quiet gap that makes this worth tracking
Here is the piece that ties the whole stretch together. West Sunset Way is supposed to wrap by the end of September. Salmon Days does not start closing streets until October 3. That leaves a window of just a few days, roughly September 30 through October 2, when downtown Issaquah is neither under construction nor under festival closure for the first time since early August. It is not a long window, and City of Issaquah construction schedules are, by the city's own admission, subject to change. But if you have been putting off an errand that requires easy parking near Front Street, that is the window to watch for.
After October 4, the closures lift and the corridor goes back to normal, at least until the next round of city projects gets scheduled. For now, the six weeks between late August and early October are as close as downtown Issaquah gets to a single, connected season: a market winding down, a bridge reopening, a new bus route quietly starting up, and a 57-year-old festival closing in behind all of it.
If you are weighing a move within Issaquah, or you just want a team that tracks this town's calendar as closely as its market, Perkins & Associates | Joe Perkins has been working Greater South King County and the surrounding communities for years. Reach out anytime, including for a free home valuation, whenever the timing is right for you.
