Col de Larche/ Colle della Maddalena is an international high mountain pass at an elevation of 1.996m (6,549ft) above the sea level, between the Cottian Alps and the Maritime Alps, located on the border between Italy and France.
On the Italian side, the road to the summit (historically known as Col de l'Argentière) is called SS21. On the French side is called D900. Both are asphalted. It is a very easy climb which is never steeper than around 5%.The pass links Barcelonnette in France with Cuneo in Italy. Note that the bicycling on the French side from Les Gleizolles to the pass is officially forbidden due to hazards of rock falls/landslides that they argue would be more difficult for cyclists to escape than motorised vehicle.
There are 2 routes to reach the summit. Starting from Les Gleizolles, the ascent is 16.1 km long. Over this distance, the elevation gain is 682 meters. The average percentage is 4.2 %. And starting from Vinadio, the ascent is 31.7 km long. Over this distance, the elevation gain is 1.087 meters. The average percentage is 3.4 %.