Every August, the Toronto and Region Conservation Authority celebrates this remarkable migration with a free festival marking the beginning of the monarchs’ journey south.
There’s a reason monarch butterflies return to Tommy Thompson Park every year. Located where two major migratory flyways meet along the Lake Ontario shoreline, the park provides a vital stop before the butterflies begin their risky journey across open water on their 4,000-kilometre migration to central Mexico.
More than 55 species of butterflies and moths have been recorded here, and late August marks the beginning of the monarch migration season at the park. During peak migration, monarchs can gather in impressive numbers throughout the park.
Festival Highlights
Hosted by the Toronto and Region Conservation Authority, the free Butterfly Festival features guided butterfly walks, family-friendly games, and interactive activities that make it easy to learn about monarchs and their incredible migration.
Visitors can also explore community booths focused on pollinator conservation and the importance of protecting butterfly habitats. In past years, the event has included Indigenous land acknowledgements and smudging ceremonies, adding a meaningful community element to the celebration.
The festival is intentionally simple, focusing on nature rather than entertainment. Visitors can meet knowledgeable naturalists, walk through the scenic trails, and have plenty of opportunities to watch monarchs before they begin their epic migration.
Wear comfortable shoes, as some of the best viewing areas are a walk from the entrance, and consider bringing a camera to capture the spectacle. Admission is free, with optional donations supporting the Monarch Teacher’s Network of Canada and its butterfly conservation efforts.
Need To Know Details
- When: Saturday, August 22, 2026, from 10 a.m. to 3 p.m.
- Where: Tommy Thompson Park, 1 Leslie Street, Toronto
- Admission: Free. Donations to the Monarch Teacher’s Network of Canada are encouraged to support butterfly conservation
- What to expect: Guided butterfly walks, family-friendly activities, interactive games, community booths, and educational displays about monarchs and pollinator conservation
- Getting around: A free shuttle operates between the park entrance and the Pedestrian Bridge throughout the festival, but expect some walking
- What to bring: Comfortable walking shoes, a refillable water bottle, sunscreen, and a camera for the best butterfly viewing. The park’s Nature Centre also lends out free Nature Exploration Kits with items like binoculars and field guides (first come, first served)
- Good to know: Tommy Thompson Park has a no-pets policy to help protect local wildlife
