Below is my route through Colombia, the dotted blue line is the boat trip from Cartagena to Porvenir (Panama).
Pasto-Mojarras-Rosas-Popoyan-Santander-Cali-Andalucia-Pereira-Manizales-Aranzazu--Pacoras-La Pintada-Medellin-Santa Rosa-Valdivia-Caucasia-Planeta Rica-Sincelejo-San Juan-Cartagena.