Stouffville GO Weekend Closures Through the Holidays: Dates for Unionville, Markham and Mount Joy

GO Transit · Markham Real Estate

If you catch the train at Unionville, Centennial, Markham or Mount Joy, a weekend closure can change a family visit, a holiday outing or a Saturday at the office. The useful thing, this month, is a simple calendar.

Michael John Lau, REALTOR®, often hears from buyers who want a short walk to the GO train. He has 80+ reviews from local clients. This post does not argue that expansion will add value. It sets out the remaining published dates, in plain language, so you can plan around them.

The remaining dates, at a glance

GO Transit and Metrolinx say work may be adjusted, rescheduled or extended because of weather or unforeseen circumstances. Treat the table below as the published plan as of November 11, 2026, and confirm before you travel.

Source: Metrolinx, Planned Construction, Six-Month Look Ahead, Stouffville line section, checked with the GO Transit Stouffville construction page on November 11, 2026. November 7 and 8, 2026, was also a full no-train weekend and has already passed. Plans can change.

What a full no-train weekend looks like

On the full closure weekends, there is no GO train service on the line. GO buses are planned to serve Old Elm, Stouffville, Mount Joy, Markham, Centennial and Unionville GO, then run direct to Union Station Bus Terminal. There is no GO Transit service at Milliken, Agincourt or Kennedy on those weekends.

The next of those weekends is November 28 and 29, 2026, during the holiday season. For this year's festival and parade dates, see the Markham holiday events guide for 2026.

When trains still run, but not all the way to Union

On Saturday, November 21, and on December 12 and 13, trains are planned to run between Old Elm and Scarborough GO. For Union Station, the published plan is to connect to Lakeshore East at Scarborough GO. On January 30 and 31, 2027, trains are planned only as far as Kennedy GO, with a TTC connection for Union Station.

The weekday change on November 30 and December 1

This one is easy to miss because it is not a weekend. The look-ahead says there will be no train service between Union Station and Unionville GO until 12:00 noon on December 1. GO buses will replace those trains. Trains are planned to run between Unionville GO and Mount Joy / Old Elm.

If you are comparing homes near the line

Buyers looking at Unionville, Markham Village, Centennial and Mount Joy should use the official notices, not a remembered weekend pattern, when they plan showings or a first commute. A related, and separate, issue is parking at Unionville GO. See the Unionville GO parking lot closure. For neighbourhood context, see Markham neighbourhoods for buyers who want a short walk to GO and the Markham public transit guide. A longer-term look at how GO expansion relates to long-term value in Markham is also on the site.

Frequently asked questions

Please note: This article is a dated commute calendar based on published GO Transit and Metrolinx notices. It is not a guarantee of service. Work may be adjusted, rescheduled or extended because of weather or unforeseen circumstances. Confirm your trip on the official GO Transit pages before you travel.

Sources

• GO Transit, Stouffville Construction (checked November 11, 2026)
• Metrolinx, Planned Construction, Six-Month Look Ahead, Stouffville line section

Michael John Lau, REALTOR® · eXp Realty, Brokerage · Serving Markham & York Region, Ontario

Photo: Dillan Payne, CC BY-SA 4.0, via Wikimedia Commons