From Barcelona:
You can follow the main road of Llobregat (through the Cadí tunnel) and drive up the N-260 road from Bellver.

You can also take the N-II road up to Cervera, then go from Cervera to Ponts, and from Ponts to La Seu through the 1313 road, the artery of the Segre river. Another possibility is passing by Calaf, via Jorba. Those who want to enjoy a more varied countryside should try this alternative.

From Girona:
The most usual route passes by Banyoles, Olot, Sant Joan de les Abadesses, Ripoll, la Collada de Toses, Alp, and Bellver. You can also get there from the so-called Eix Transversal (Transverse Axis).