Portions of the right-of-way still exist as the multi-use Interurban Trail through Fife, Milton, Edgewood, as well as from Pacific to Tukwila, Washington.

The PSE began operations on September 25, 1902[3] with a line that started in downtown Tacoma, ran along Pacific and Puyallup Avenues, followed the course of present-day Pacific Highway through Fife and to Milton, turned southeast towards Puyallup and paralleled the path of today's SR 167 through Pacific, Algona, Auburn, Kent, Orillia and Renton, then into Seattle on its own dedicated right-of-way, via South Park, from there running on surface streets to the area near Pioneer Square.

At its peak the line saw 27 daily departures and arrivals split between the Tacoma and Renton branches with trains running from 7 in the morning to midnight.

[10] Portions of the PSE exist today as the multi-use Interurban Trail in Fife, Milton, Edgewood, Pacific, Algona, Auburn, Kent, and Tukwila.

The gaps in the cities of Milton and Edgewood are currently in the design stage, with construction slated to begin in 2026 pending funding.