Olius is a municipality in the comarca of Solsonès in Catalonia, Spain. It is situated on the Cardener River above the reservoir of Sant Ponç. Th…Olius is a municipality in the comarca of Solsonès in Catalonia, Spain. It is situated on the Cardener River above the reservoir of Sant Ponç. The village is served by the C-149 road between Solsona and Berga. The church of Sant Esteve d'Olius is a protected historico-artistic monument.