This interpretive walk, led by Don Watershed Regeneration Council chair and Toronto Field Naturalists volunteer Peter Heinz, starts in the manicured gardens of TBG, meanders through a narrow ever-changing ravine, climbs the steep shore of an ancient lake and descends into the wide valley of the West Don River. Learn the story of the river as our looped journey (approximately 6.5 km) follows a small watercourse degraded by rapid urban development and climate change.