The Kānvar (or Kānwar/ Kavad) Yātrā is an annual pilgrimage of devotees of Shiva, known as Kānvarias(कावड़िया) or "Bhole" (भोले), to Hindu pilgrimage places of Haridwar, Gaumukh and Gangotri in Uttarakhand and Sultanganj in Bihar to fetch holy waters of Ganges River. Wikipedia