Sound Transit Link 1 Line

System

Link Light Rail

Type

Light rail transit

Number of stations

19

Cities serviced

Seattle, Tukwila, SeaTac

Termini

Northgate
Angle Lake

Operations

Opened

July 18, 2009

Owner

Sound Transit (1999–present)

Operator

King County Metro

Rolling stock

Sound Transit 101-135

Sound Transit 136-162

Sound Transit 201-352

Technical

Line length

24.65 mi (39.67 km)

Track gauge

1,435 mm (4 ft 8 1⁄2 in)

Electrification

1500V DC Overhead

Operating speed

89 km/h (55 mph)

Line Diagram

Link Light Rail 1 Line Map 2021

Sound Transit Link 1 Line is a light rail line operated by Sound Transit in Seattle and the surrounding area. Operations for the 1 line are currently under contract to King County Metro, which operates all train services. The 1 Line is currently the only Central Link line, though more lines are planned with future system expansions.

Route Details

The route starts with Northgate Station at the northern end, runs via the University of Washington, Capitol Hill, Downtown Seattle Transit Tunnel, Beacon Hill, Rainier Valley, and Sea-Tac Airport, with Angle Lake Station being the southern terminus.

Stations

Stations are listed in order, traveling from North to South.

Northgate
Roosevelt
U District
University of Washington
Capitol Hill Connection to First Hill Streetcar
Westlake Connection to South Lake Union Streetcar
University Street
Pioneer Square
International District / Chinatown Connection to N Line, S Line, First Hill Streetcar. Connection to 2 Line in 2025.
Stadium
SoDo
Beacon Hill
Mount Baker
Columbia City
Othello
Rainier Beach
Tukwila International Boulevard
SeaTac / Airport
Angle Lake

Service Frequency

	Frequency
Peak Hours	8 mins.
Midday	10 mins.
Evening	10 mins.
Late Night	15 mins.
Early Mornings	12 mins.
Saturdays and Sundays/Holidays	10 mins.

First and Last Trains

Southbound Service

Northgate to Angle Lake
	First Train from Beacon Hill*	First Train from Stadium*	First Train	Last Train
Weekdays	4:13 a.m.	4:34 a.m.	4:45 a.m.	12:23 a.m.
Saturdays	4:13 a.m.	4:34 a.m.	4:45 a.m.	12:23 a.m.
Sundays/Holidays	5:06 a.m.	N/A	5:24 a.m.	11:23 p.m.

* The first Southbound trains of the day start at Beacon Hill Station.

Northbound Service

Angle Lake to Northgate
	First Train from SODO*	First Train from SeaTac/Airport*	First Train	Last Train	Last Train to Beacon Hill**
Weekdays	4:24 a.m.	4:36 a.m.	4:59 a.m.	11:56 p.m.	1:12 a.m.
Saturdays	4:44 a.m.	4:36 a.m.	5:03 a.m.	11:56 p.m.	1:12 a.m.
Sundays/Holidays	5:25 a.m.	5:36 a.m.	5:43 a.m.	11:11 p.m.	11:31 p.m.

* The first several trains of the day start at SODO Station.
** The last several trains of the night terminate at Beacon Hill Station.

History

July 18, 2009 - Service starts from Westlake Station to Tukwila International Boulevard Station.
December 19, 2009 - Service starts from Tukwila International Boulevard Station to SeaTac / Airport Station.
March 19, 2016 - University link extension opened for service. Added Capitol Hill Station and University of Washington Station.
September 24, 2016 - Angle Lake Station opened for service.
March 23, 2019 - End of joint bus/light rail operations in the Downtown Transit Tunnel.
September 21, 2019 - Section from University of Washington Station to Angle Lake Station renamed Red Line
October 2, 2021 - Section from Northgate Station to Angle Lake Station renamed 1 Line
October 2, 2021 - Northgate section opened, added U District, Roosevelt and Northgate stations.

Future Plans

Line 1 Extension Plans

Future Stations

Lynnwood Extention(Planned Opening August 30, 2024) North From Northgate Station

Federal Way Extension (Planned Opening 2025-2026) South From Angle Lake Station

Future Extensions

August 30 2024 - 1 Line extension to Lynnwood
2030-2031 - 1 Line extension to Tacoma Dome
2037-2039 - 1 Line rerouted north of downtown Seattle on extension to Ballard ^[1]