Overview

• The inaugural Ontario Honda Dealers Indy at Markham is scheduled for Aug. 14–16, 2026, shifting the event from its traditional mid-July slot.
• The temporary Markham Centre circuit will be 3.52 kilometres with 12 turns and a double‑sided pit lane, designed by Tony Cotman of NZR Consulting.
• Promoter Green Savoree confirmed a multi‑year agreement, with multiple outlets reporting it as a five‑year hosting deal through 2030.
• Officials project more than 140,000 attendees and tens of millions in economic impact, with early site works underway in coordination with Metrolinx.
• The layout borders Kennedy Road, Enterprise Boulevard, the Unionville GO tracks and Highway 407, drawing some resident concerns over traffic and noise near mixed‑use and residential areas.