Visit the character-rich city of Jamundí just to the south of Cali. Just south of the downtown, take Via Chipaya west into the rural areas. This road might change names but essentially you want to follow it on a lovely, unpaved circuit, which ultimately passes through the town of Potrerito and then returns to Jamundí.
We never made it the full way around as it was getting late. So instead we asked permission to camp on a small landholder’s field on the ridge of one of the hills. If you make it all the way around, let me know how it was.