The annual Pandharpur Yatra to the famous Vitthal Temple at Pandarpur in Maharashtra is an unparalleled pilgrimage that breaks the barriers of caste, creed, rich and poor. Vitthal Temple is also known as Vitthal Rukhmini Temple and is dedicated to Lord Krishna. The most important annual pilgrimage is a 21-day trek known as Pandharpur Ashadhi Ekadasi Waari. In 2011, the Pandarpur Yatra Palki of Tukaram Maharaj from Dehu near Pune will start on June 22, 2011 and will end on July 11, 2011 at Pandarpur on Ashadi Ekadasi.
Pandharpur Yatra takes place twice in a year one during Ashadhi Ekadasi (June – July) and another during Kartik Ekadasi (October – November)
For more details see these pages