In the Rincon de la Vieja National Park there are three main trails: the Crater Rincon Trail, the Cataratas Escondidas Trail and the Pailas Trail.
The length of your stay in Rincon de la Vieja will depend on which trails you want to do. If you only want to do one trek, one day will suffice. If you want to do the three trails, you will have to spend at least three days here.