This itinerary begins in Viggiù, continues in Switzerland by passing the western part of the Mendrisio region and, in following the shore of the Lake of Lugano, returns to Italy at Porto Ceresio. From here, along the lakeside and the River Tresa, it arrives at Luino where it ends. Its length is about 30 kilometres, almost always on secondary roads or far from those bearing the most motor traffic - therefore easily done by bicycle (which including stops will take you from about 4 to 6 hours or else the whole day, depending on the number of visits you prefer to make). Between Riva San Vitale and Brusimpiano the crotti are not lacking: that is, the old taverns and inns, now transformed into bars and restaurants at which under colonnades or arches it is a pleasure to pause for a while to drink or eat a little.
From Luino it is possible to return to our starting point by using Via Cuvia to Grantola, and then for Ghirla, Marchirolo and Ardena to once again descend to Brusimpiano and Porto Ceresio. From here it is possible to climb again to Viggiù by way of Bisuschio or Besano. If you're cycling keep some energy in reserve for the final climb... it's quite steep!
For the cyclers the return journey demands a little more than an hour - although of course it depends on just how fit you are at this point.
Viggiù can be reached with the A8  motorway, take the slip road for Gazzada and then follow the indications for Gaggiolo. This locality is also easily reached from the north by taking the Lugano-Chiasso motorway, slip road for Mendrisio. From Gaggiolo follow the indications for Viggiù. Bisuschio is the nearest locality which can be reached by train with the Ferrovie dello Stato. Viggiù is connected by a bus service.