Montroc is a small hamlet at the north western end of the Chamonix Valley on the road up from Argentiere to Le Tour. It is a very small hamlet without any commercial establishments, restaurants or hotels. It is mostly residential and neighbors directly to Les Frasserands. There is a dairy farm called the Ferme de Montroc which sells home-made cheeses and other dairy products. This farm is located on the other side on the river on the trail to Le Planet.

The Montroc-Le-Planet train station serves all the neighboring hamlets of Le Planet, Montroc, Les Frasserands and Tre-le-Champ. The train runs through the entire Chamonix Valley starting at Saint-Gervais-les-Bains and ending at Vallorcine from where the swiss train runs all the way to Martigny in Switzerland. There is also a bus station in Montroc. There is parking located on the side of the road going towards the train station.

Montroc was hit by a large avalance on February 9, 1999 that killed 12 people. There had been an exceptional amount of snow in a short period of time and the avalanche came from the Montagne de Peclerey. The mayor of Chamonix at the time was found guilty of involuntary manslaughter and received a suspended prison sentence of 3 months for failing to evacuate the residents on time. There is a memorial cross remembering the victims of this big avalance at the foot of the Montagne de Peclerey on the main road towards Le Tour.