Drive by a mountain road till the highest parking place above Prada, cca 1300m. Perhaps sleep there. Leave bikes on the parking place and drive early in the morning down to Garda lake and to Malcesine cable way. The cable way brings you up on the main ridge, 1745m. Then go southwards all the way by the ridge. Ascend as many elevations you wish, and certainly the highest one, Cima Valdritta. After descending to the parking place you only bike down to Malcesine. If a clear weather, you will remember that day!
As we couldn't do the proposed tour, here is only the description of the route over the southern part. The northern part is described here.
The tour is mostly an easy hike up. On the upper part there are a few rocky passages, but the path is wide enough and requires just the usual hiking concentration. Gear: Good shoes and poles.
South before Prada, a mountain road deters towards the east. It is narrow, but well maintained and asphalted. The road is closed for public traffic on some 1300m, where there's a big parking place. Roads, which go further on towards the ridge are more and more narrow and rugged, but can be done by a mountain bike (as high as you wish - till almost 2000m) and also authorised locals drive there with 4WD.
Just above Rifugio Chierego there's the grassy summit, called Coal Santo, 2072m. If you can't wait ascending the first higher summit of Monte Baldo, you can cross it, otherwise two marked paths go around it (by the east and west), so you'll probably continue by the western cart road around it and reach on the other side Bocchetta di Coal Santo. A broad path continues from there towards the north. Next is Passo del Camino, 2128m, after which the broad path switches on the eastern slopes of the main ridge. Through an attractive scenery of rock towers we continue below the summit of Vetta delle Buse, 2154m, and reach the saddle below Punta Sascaga, 2136m. This summit can again be detoured by the eastern or western side (or can be scrambled over the top), the western path brings us directly to the big Rifugio Telegrafo, 2147m. Just above it is another big summit of Monte Baldo massif, Monte Maggiore, 2200m.
From below Monte Maggiore (south of the summit) the main marked path (No. 651) descends a bit on the eastern side and then continues towards the NE, towards Cima Valdritta. The path crosses the slopes below Punta Pettorina, 2192m, then turn more towards the N direction and reaches Forcella Valdritta. There the path No. 66 comes up from the east (the shortest ascent on Cima Valdritta). On the notch just south of Cima Valdritta, there's another important crossing. One path goes across the ridge and descends on the western side (No. 5), one path continues crossing the slopes towards the north (No. 651), while we follow the third (middle) path, ascending directly up on Cima Valdritta. It's less than 10 minutes to the top, the path is well carved, but a bit more steep.
Depending on your logistic, there are several options for a descent.