The Northgate Link Extension adds three new stations in Seattle, two underground (U District and Roosevelt stations) and an elevated station at Northgate, which will feature frequent bus connections, a park and ride and a bicycle/pedestrian bridge to North Seattle College. Northgate will be the system's northernmost station when the extension opens in 2021. In 2024 light rail extends further north to Shoreline, Mountlake Terrace and Lynnwood.
- Length: 4.3 miles; 3 stations
- Service: Every 4-6 minutes during peak hours.
- Trave time:
- Northgate to University of Washington - 7 minutes
- U District to Westlake - 8 minutes