Along the valley there is a cycle path from Lake Ledro to Lake Ampola and several side road, where you can easily bike, such as the road that leads to Val Concei and Rifugio Al Faggio.
Moreover there is a cycle path leading from Lago di Garda up to the Val d'Ampola. From Riva del Garda you take the Ponale trail (this is a must-see, with many unique views for cyclists and hikers alike, so watch where you're going!) up to the mouth of the tunnel.
In order to avoid cycling on the main road, we recommend crossing the bridge to Pregasina and turning right immediately onto a paved and almost level trail which leads to the village of Prè. The route leads into the village and straight on past the church. From this point on the road is almost all surfaced, and although it is quite steep in places it provides an alternative route to Molina, avoiding the busy traffic of the main road. Once we have reached the sports field just below Molina di Ledro, we continue along the Ponale river. From Molina we choose to take the main road or the route along southern shore of the lake as far as Pieve di Ledro. From Pieve we continue to the left hand of the main road until after Bezzecca, and then on stretches of cycle- and footpaths and open roads to Tiarno di Sopra.
...or reads them online