From Montseny to Cerdanyola

Very pleasant uphill from Sant Celoni to Santa Fe de Montseny, long but as long as you find your rythm it goes same to the top. Downhill to Seva is not as rewarding as you could wish as there are few small uphills on the way, then uphill to Collsuspina is another relatively easy uphill, this time with high speed downhll to Moia and Calders, no real need of breaking in this part. Then passing through small hills road goes to Castellar and then Sabadell, and finally to Cerdanyola. As there is quite some traffic from Castellar and especially from Sabadell, taking train is one option. From Cerdanyola you can take a road to Barcelona, thorugh Horta or next to the Besos river, if you need to get there.