Sierra Norte Overnight Trek in the Pueblos Mancomunados Embark on a breathtaking adventure through the stunning landscapes of Sierra Norte. Our team will pick you up from your hotel in Oaxaca and take you on a 2-hour journey to Llano Grande, where you'll begin a trek along the "Cueva Iglesia" route. Th... Expediciones Sierra Norte Discover the hidden gems of the Sierra Norte with the Pueblos Mancomunados. Explore forests, rivers, and waterfalls, and learn about the customs and traditions of the Zapotec people.