Take the bus (which runs 2-3 times a day) from Cevio to Cimalmotto. The red-and-white waymarked path climbs gently from Cimalmotto towards Cavà. Coniferous forests adorn this area, and in autumn the larch – a fan of high altitudes – colours everything in gold.
From there you continue to the Alpe Quadrella, which was farmed until about 2000, and then steeply to the eponymous pass, which offers views of Campo Vallemaggia and Bosco Gurin.
The descent zigzags down to Chumma through the Valle di Bosco Gurin to the only German-speaking village in the Ticino, Bosco Gurin; it's also the highest in the canton. The Walser village is replete with culture and history, all waiting to be discovered at the Walserhaus Museum.
The bus from here to Cevio runs several times a day (make a note of the times in advance).