Mountain range of Segaria Nature · Pego, La Marina Alta, Alicante Mountain range near Pego, with excellent conditions for hiking and cycle touring, in the comarca of La Marina Alta. Together with the sierra de Mostalla, it frames the valley of Pego in a horseshoe shape, and both form karstic aquifers that supply water to the surrounding vega. Photo: Espencat (Public domain) What to see and do in Pego