Trillium Park, Public park in Toronto waterfront, Canada.

Trillium Park is a public park on the Lake Ontario waterfront in Toronto, built on the site of a former parking lot at Ontario Place. Its rolling landforms, rock outcrops and pebble beaches hold almost 1,200 Ontario trees, including red oak, red pine and sugar maple, plus about 28,000 shrubs and perennials. The Sunrise Garden Pavilion, designed by West 8, is an open-air shelter whose three steep joined gables rest on pale concrete columns, with light wood lining the roof underside.

Trillium Park occupies the site of a former parking lot at Ontario Place, which Premier Bill Davis opened in 1971 and which closed in 2012 after attendance fell from 2.5 million to 300,000. The province then appointed John Tory to propose revival ideas, and in 2014 the Ministry of Tourism, Culture and Sport outlined a plan that included a park and trail. Built by Urbacon with design lead LANDinc and West 8, the CA$30 million park opened in 2017 after three and a half years of work.

The ravine at the park entrance, beneath a bicycle and pedestrian bridge, carries moccasin images carved into its walls; the Mississaugas of the New Credit First Nation helped develop them. Three marker trees, forced into two 90-degree bends in each trunk, follow a First Nations navigation practice. The William G. Davis Trail honours former premier Bill Davis, who opened Ontario Place in 1971.

The William G. Davis Trail runs 1.3 km along the park's west side and links it to the Martin Goodman Trail. Washrooms stand at the entrance, and the Ravine with Moccasin Identifier passes under a bicycle and pedestrian bridge there. The West Gate toward Ontario Place was not open when the park opened.

The Summit, at the park's southern end, is its highest point, with seating on gentle slopes above the lake. Near the Sunrise Garden Pavilion, a fire pit at the water's edge is where visitors hold bonfires and look toward the CN Tower.