May is a fabulous time to walk, cycle or drive through these mountains as roadside verges, pastures and scrubland turn glorious colours with a varied selection of wild flowers. The springtime rains have ensured a vivid display and many plants compete for space in a hurry to flower and set their seeds before the ground dries out during the summer months. Hillsides can turn yellow with shrubby Retama, whereas the many meadows are a tapestry of pastel shades brimming with annuals.