

Doors Open Markham is back!
Explore a variety of buildings across the city as they open their doors to the public - for one day only! Doors Open Markham offers a rare behind-the-scenes look at select sites throughout Markham, including free access to buildings that typically charge admission.

Featured Event
40th AppleFest Presented by Don Valley North Toyota
Get ready for a spectacular celebration at AppleFest.
Read MoreUpcoming events
September 2025
Sat 13
Free Guided Walk at Rouge National Urban Park - Butterflies of the Rouge
19th Avenue Day Use Area - Rouge National Urban Park
10:00 am to 12:00 pm
Sat 13
Free Guided Walk at Rouge National Urban Park - Fascinating Fungi
Bob Hunter Memorial Park - Rouge National Urban Park
1:00 pm to 3:00 pm
Sun 14
Free Guided Walk at Rouge National Urban Park - Nature's Adaptation to Changing Light
Bob Hunter Memorial Park - Rouge National Urban Park
10:00 am to 12:00 pm