From Tamarindo (3 stops):

Take Bus to Liberia: http://directoriosantacruz.com/horario-transportes-la-pampa-liberia-flamingo-matapalo-tamarindo/

Take Bus to Cañas: http://yoviajocr.com/chronos/horarios/liberia-canas

Take Bus to Upala (Get down in Bijagua)   http://yoviajocr.com/chronos/horarios/canas-upala

From Monteverde (3 stops):

Take Bus to Puntarenas: http://yoviajocr.com/chronos/horarios/monteverde-puntarenas

Take Bus to Liberia (Get down in Cañas) http://yoviajocr.com/chronos/horarios/puntarenas-liberia

Take Bus to Upala (Get down in Bijagua)  http://yoviajocr.com/chronos/horarios/canas-upala

From La Fortuna (3 stops):

Take Bus to Ciudad Quesada: http://yoviajocr.com/chronos/horarios/fortuna-ciudad-quesada

Take Bus to Upala: http://yoviajocr.com/chronos/horarios/ciudad-quesada-upala

Take Bus to Cañas (Get down in Bijagua) http://yoviajocr.com/chronos/horarios/upala-canas

From San Jose (Direct) 

Take Bus to Upala (Get down in Bijagua) http://yoviajocr.com/chronos/horarios/san-jose-upala-x-canas