One of the best Inka trails in Bolivia is a short 2 hours from Tarija. It starts in Tajzara National Park at an altitude of 3700. Descend gradually on an Inka trail. Then take a lovely walk along the river for 2 hours. Swim in the beautiful clear lagoons. A simple lunch is also provided.
Pink Flamingos and Condor sightings are common on this tour.
The views are incredible but please be advised this walk is best suited for intermediate to experienced walkers. The last 4 hours are all downhill on the Inka trail.