In April 2015, I did a route of northern Italy including several lakes. I rode a loop route from Milan. I rode east to VIcenza via the southern edge of Lakes Como and Garda. Then, I headed north to Trento and started west via the northern part of Lake Garda and went by Lakes Ladro, Idro, and Iseo. I then went north into the Dolomites turning back at Bormio and riding to the north end of Lake Como. From there, I went to Lake Lugano and then Lake Maggiore before returning to Milano. A truly fabulous trip! I wrote
a detailed journal, as I always do, if you would like more information.
Some random thoughts:
Bormio is a very pretty place at the base of the Stelvio Pass. It is a challenge to get to but I really liked it.
Be sure to check if the passes are open before trying to ride over them!
Expect haze in the Po Valley.
The bike trail from Bassano del Grappo to Trento was fabulous.
Don't assume that Swiss National Bike routes are good biking.
Check that the ferries you are planning to use take bicycles.
The Italian Lakes are a pretty part of the world. You will have a great time, if the weather cooperates!