When traveling from Managua, take the 'Carretera Nueva a León'. Once you get to the city of León, continue driving on the highway to Chinandega. After reaching th municipality of Telica, you will find a split in which you have to turn to the right. You will get to Malpaisillo, and when you get to Dos Montes, turn left and you will arrive to El Sauce.
You will find buses to Managua, Achuapa, León, Somotillo and other villages of El Sauce at the municipal market of this same city.