Thornton Bales Conservation Area is famous for its steep slopes and rugged beauty. This Area of Natural and Scientific Interest (ANSI) is part of the Oak Ridges Moraine, and has an elevation that drops 54 metres from its southwest corner to its northern boundary.​

Nicknamed "The 99 Steps", this conservation area features an accessible lookout to enjoy the breathtaking panoramic views at the ridge of the forest. No​w with exactly 99 steps (we dare you to count them) to get you from the top to the bottom of the ridge, visitors will descend to the Red Oak Trail - best suited to people who are in good physical condition and enjoy a challenge. Water bottles and supportive footwear with rugged soles are strongly recommended for hikers targeting these woodland trails. Among the wildlife that can be found in this ravine-like setting are pileated woodpeckers and white-tailed deer.