One of the most beautiful valleys of Corsica, Maganello is some 15km of cascades, waterfalls and rock pools. You can reach it from Route Nationale 193. Between Tattone (south) and Vivario (north) a narrow little side road (D23) heads east into the Manganello valley. The trailhead is at the very end of this road at Canaglia.
Altitude gain: 1855m
Difficulty: I+ (only at the summit)
The manganello Valley is one of the most beautiful valleys of Corsica. It follows Manganello creek, which for most of the time is an endless sequence of waterfalls, cascades and corresponding rock pools. In summer you will certainly take the opportunity to take a bath so that you should do the ascent in two days rather.
From Canaglia follow the dirt road through the valley. Most of the trail is an easy hike only at the end of the valley you need to do some scrambling to reach the Refuge Petra Piana. From the lower parts of this ascend Monte Rotondo is almost always visible. After 3h 15min you reach the high plain near Bergerie de Gialgo at 1610m, after another 45min you're at Petra Piana.
The further ascend heads upwards to Lago Bellecone (2519m) and from there into the pass left of Rotondos Summit block. Here an exposed scramble (I+) leads you to the summit with the summit bivouac.
Hiking gear and warm clothes are neccessary. Since there often is snow in the couloir, that leads to the summit ridge - even in late June - crampons might come in useful.