Karoo to Coast Karoo to Coast The Karoo to Coast is an annual 100 km mountain bike race held in September down the Prince Alfred's Pass from Uniondale to Knysna in South Africa. In 2007 this was voted one of the top ten mountain bike races in the country. All proceeds go to the Lions Clubs International “SightFirst” fund, financing sight restoration surgery for the poor. Started in 1999, this event is considered extremely arduous along a route of which 93% is on gravel roads, from a high point of 1045 m down to sea level, with many long and gruelling climbs, often
Karoo sediments. This exposed the dolerite sills, which were more resistant to erosion than the Karoo sediments, forming one of the most characteristic features of the Karoo landscape, namely the flat topped hills, called "Karoo Koppies". The geology of the region bears no resemblance to that of the Great Karoo (see the diagram on the left, of a NS geological cross-section through the Little and Great Karoos). The valley is an integral part of the Cape Fold Mountain Belt, with the two ranges on either side composed of extremely hard, erosion-resistant, quartzitic sandstone belonging to the 450- to 510-million-year-old Table Mountain