Walking the entire circumference of Lake Como is a massive undertaking, as the lake has a perimeter of approximately 170 kilometers (about 105 miles). Because of the rugged terrain and steep mountains that dive directly into the water, there is no single "circumference path" that stays at water level the entire way. Most walkers instead focus on the Greenway del Lago di Como, which is a spectacular 11.2 km (7 mile) trail on the western shore that passes through charming villages like Lenno and Tremezzo. For more serious hikers, the Sentiero del Viandante (Wayfarer's Trail) on the eastern shore covers roughly 45 km (28 miles) from Abbadia Lariana to Colico. If you were truly committed to walking the whole lake using a mix of roadside sidewalks and mountain trails, it would likely take a fit hiker 7 to 10 days of consistent walking. Most tourists find it much more enjoyable to walk between a few villages and use the efficient ferry system to cross the water, rather than attempting to navigate the narrow, high-traffic tunnels that some sections of the main road (the Via Regina) require.