About half the adult females will breed in a given year. Litter sizes are small, about two and a half pups. Active seasons are relatively long, five and a half months, but young tend not to disperse for at least 3 years. Sometimes new adult males move into a social group and kill pups. Such male infanticide has also been reported in golden marmots.
Alpine marmots have two different alarm calls.
They commonly whistle and occasionally produce a descending whistle . The more common whistle tends to be repeated a variable number of times and is associated with the degree of risk a caller experiences.