Private transportation from La Paz to La Cumbre (4,650 m/15,252 ft), to start biking from the snow capped mountains of the Andes and descends its eastern flanks steep and down until Yolosa at 1,150 m/3,772 ft in 5 hours. You'll cross waterfalls, cliffs and appreciate how the vegetation slowly appears until the tropics of the Amazon. From Yolosa trip to Coroico, a nice town with good facilities, transportation to La Paz.