One of my favs HARD and Long hike! Bruce trail- Three Sisters.

This is one of my favourite hikes!
And an annual one! It's long, and fun and about 21km.
It's what I would call difficult because you need stamina folks. Hockley Valley is part of the Niagara Escarpment, which was created by a long process of erosion. The escarpment cuts dramatically across the southern heartland of the province.
Hockley Heights side trail. Three Sisters section is a 3.4 mile (8,000-step) route located near Mono, Ontario, Canada. This route has an elevation gain of about 944.6 ft and is rated as hard.
So come with lots of water, a fun mindset, and be mindful it could be a challenge.
Meet-up point: Bruce Trail Car Park, 307295 Hockley Rd, Orangeville, ON L9W 2Y8 (diagonally across the road from the Black Birch Restaurant).
GPS Co-ordinates: 43°58'22.2"N 80°03'21.8"W