Traffic impacts for Tamarack Ottawa Race Weekend

Tamarack Ottawa Race Weekend is running through downtown this weekend, from Saturday, May 23 to Sunday, May 24.

The running event starts and ends at Ottawa City Hall, 110 Laurier Avenue West, and involves intermittent lane reductions and closures on Saturday, from as early as 11 am until 9 pm, and on Sunday, from as early as 5 am until 2 pm.

Major roads impacted at various times by the event include:

• Laurier Avenue
• Elgin Street
• Queen Street
• O’Connor Street
• Bank Street
• Wellington Street
• Kichi Zībī Mīkan
• Booth Street
• Chaudière Bridge
• Alexandra Bridge
• Sussex Drive
• Sir George-Étienne Cartier Parkway
• Rideau Street
• Colonel By Drive
• Pretoria Bridge
• Queen Elizabeth Driveway

A full list of the lane reductions, road closures and times are located on the Tamarack Ottawa Race Weekend website.

For updates on construction and roadwork activity across Ottawa or for information about traffic and travel planning, visit the City’s traffic map or follow the City’s traffic account on X.

OC Transpo

O-Train Lines 1 and 2 will start at 5 am on Sunday, May 24 to make it easier for Tamarack Ottawa Race Weekend runners, volunteers and spectators to get to the downtown core in advance of the marathon. Customers are encouraged to plan their trip in advance by using the Travel Planner. 

Some OC Transpo bus services will be affected by road closures and event activities: 

• OC Transpo routes 5, 6, 7, 8, 9, 10, 11, 12, 14, 18, 19, 20, 56, 85 and night service routes N39, N45, N57, N61, N75, and N105 will be affected.
• Saturday, May 23, detours will start as early as 10:30 am and run until 9:30 pm.
• Sunday, May 24, detours will start as early as 4:30 am and run until 3 pm, and there will be no OC Transpo service to Gatineau from 5:45 am until 12 pm.
• Para Transpo travel times may be affected by planned road closures. 

Full details of OC Transpo service impacts can be found on the OC Transpo alerts page. You can also connect with OC Transpo through Facebook, X, Bluesky and Instagram.