Col Saint Martin is a high mountain pass at an elevation of 1.500m (4,921ft) above the sea level, located in the Alps in the department of Alpes-Maritimes in France. The pass is traversed by the scenic Route des Grandes Alpes.
The road to the summit is asphalted. It’s called D 2205. It’s pretty steep. Starting from Lantosque, the ascent is 23 km long. Over this distance, the elevation gain is 1.053 meters. The average percentage is 4.6 %. And starting from D 2205, the ascent is 16.5 km long. Over this distance, the elevation gain is 1.018 meters. The average percentage is 6.2 %.