The route up Sani Pass starts at 1,544 m and climbs 1,332 m to an altitude of 2,876 m. The steep gravel road has gradients up to 1:3, which can be difficult to drive in bad weather and may be covered with snow and ice in winter. By South African law only 4x4 vehicles are allowed on the road. Occasionally, the remains of cars that did not succeed in navigating the pass's steep gradients and poor traction surfaces can be seen.