Elevated Guideway and Stations Is Going Up.

Don Mills Road & Eglinton Avenue East

The northern end of the Ontario Line, linking with Line 5 Eglinton. This is the station formerly called Science Centre; Metrolinx renamed it Don Valley in 2025.

• Links with Line 5 Eglinton at Don Mills Road.
• Renamed from Science Centre to Don Valley (announced 28 March 2025), after the nearby Don River, Don Valley Parkway and the valley itself.
• The Ontario Line runs 15.6 km and 15 stations from here to Exhibition.

Don Mills Road · Flemingdon Park

An elevated station on the stretch that runs north along Don Mills Road to Don Valley Station.

• Connected to Thorncliffe Park by the West Don Crossing bridge over E. T. Seton Park.
• Ground was broken in February 2026, alongside Thorncliffe Park, Don Valley and Cosburn stations.

Overlea Boulevard · Thorncliffe Park

Where the elevated section starts: the guideway begins at the west end of Overlea Boulevard and runs north.

• Trains run up to 14 metres above street level on the elevated section.
• Metrolinx: a Thorncliffe Park to downtown trip drops from about 40 minutes to about 25.
• The West Don Crossing bridge links the Thorncliffe Park and Flemingdon Park guideways.

Gerrard Street East & Carlaw Avenue · Leslieville

An elevated station at Gerrard and Carlaw, built beside the GO tracks of the joint corridor.

• A secant wall is built to support the neighbouring GO tracks.
• A temporary dog off-leash area replaces the existing park during station construction.
• Works include excavation, concrete foundations and piling for the guideway support columns.

Queen Street East · Riverside / Leslieville

An elevated station in the joint Ontario Line–GO rail corridor, around Queen Street East.

• Work areas sit north and south of Queen Street East, west of the tracks.
• Works include site preparation, concrete foundations and piling for the guideway support columns, ahead of station construction.