South Kirkland-Issaquah Link
Project map and summary
Project updates
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Overview
The South Kirkland-Issaquah Link project will connect growing communities east of Lake Washington via the new Link 4 Line. Beginning near the current South Kirkland Park-and-Ride, the planned route will serve three existing 2 Line stations — Wilburton, Bellevue Downtown, and East Main — before heading further east through Eastgate to central Issaquah.
Facts
- Length: 11.8 miles; 4 new stations, 3 existing stations
- Service: Every 4-6 minutes in peak hours
- Projected travel times: South Kirkland to Issaquah in 25 minutes
Project timeline
In May 2026, the Sound Transit Board adopted an updated ST3 System Plan to bring the agency’s long-term financial outlook into balance. The system plan includes funding for planning, design, and construction of the 4 Line between South Kirkland and Issaquah with an opening date forecast of 2050.
Early planning and design work for South Kirkland-Issaquah Link will launch in 2027. This work includes:
Assessing potential alternatives to the representative investments identified in the voter-approved ST3 Plan.
Identifying ways to potentially accelerate the project timeline through innovative project delivery methods, approaches, and financing strategies.
Learn more about capital project development phases here.
