Doors Open Ontario 2026 - Explore Hidden Heritage

Step inside Ontario’s most fascinating spaces with Doors Open Ontario, a province-wide series of free events running from April to October. From historic homes to modern landmarks, this unique experience gives visitors rare behind-the-scenes access to buildings, cultural sites, and hidden gems that shape communities across Ontario. ------- HIGHLIGHTS ------- - Free access to heritage buildings & landmarks - Behind-the-scenes tours of normally closed spaces - Storytelling from local experts & volunteers - Mix of historic sites, modern architecture & cultural spaces - Self-guided or curated exploration across cities ------ SEASON (MONTHS) ------ April - October 2026, Each city hosts its own weekend event 2026 EVENT DATES (CONFIRMED) ** April Stratford: April 18 -19 Guelph: April 25 **May Oshawa: May 2 Hamilton: May 2 - 3 Along the Grand: May 9 Richmond Hill : May 9 Toronto: May 23-24 June Tillsonburg (June 6) Whitchurch-Stouffville (June 6) Ottawa (June 6-7) St. Catharines (June 13) Loyalist Township (June 20) July Owen Sound (July 18) August Haldimand (August 1) Burlington (August 8) Cornwall and SDG Counties (August 15-16) September Belleville (September 12) Peterborough (September 12) Kawartha Lakes (September 13) Thousand Islands (September 18-19) Simcoe County (September 19) Waterloo Region (September 19) London (September 19-20) Aurora (September 20) Barrie (September 26) Markham (September 26) Sault Ste. Marie (September 26) October Brampton (October 3) Chatham-Kent (October 3) Quinte West (October 3) Niagara-on-the-Lake (October 17) Whitby (October 17) Woodstock (October 17) Niagara Falls (October 18) ---- OTHER INFO ----- Cost: Free Format: Self-guided + guided tours (varies by site) Registration: Some locations may require advance booking Duration: Flexible (1- 4+ hours depending on stops) Best Strategy: Plan your route in advance Start early (popular sites get busy) Pick your city, plan your route, and unlock Ontario’s hidden spaces - completely free!