is there any pilgrimage site in the place mentioned?
Yes, at Badrinath and Kedarnath.
Uttarakhand
 pilgrims have been visiting the region in the hopes of salvation and purification from sin. Gangotri and Yamunotri, the sources of the Ganges and Yamuna, dedicated to Ganga and Yamuna respectively, fall in the upper reaches of the state and together with Badrinath (dedicated to Vishnu) and Kedarnath (dedicated to Shiva) form the Chota Char Dham, one of Hinduism's most spiritual and auspicious pilgrimage circuits. Haridwar, meaning "Gateway to the God", is a prime Hindu destination. Haridwar 
what do you call ice falling from the sky Hail or sleet. how is it formed? In strong thunderstorm clouds,with intense updrafts, high liquid water content, great vertical extent, large water droplets, and where a good portion of the cloud layer is below freezing . what can be the size of this solid sleet? Their size is determined by measuring their diameter with a ruler or comparing them to coins. can they cause serious damage? Yes, to automobiles, aircraft, skylights, glass-roofed structures, livestock, and crops any incident related to the damage cause by this natural phenomenon? One of the earliest known incidents occurred around the 9th century in Roopkund, Uttarakhand, India. how did the state mentioned above get its name? From the Sanskrit words "uttara" meaning 'north', and "khaṇḍa" meaning 'land', altogether simply meaning 'Northern Land'.
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Uttarakhand [SEP] Tourism
Uttarakhand is, however, a place of pilgrimage for the adherents of other religions too. Piran Kaliyar Sharif near Roorkee is a pilgrimage site to Muslims, Gurudwara Darbar Sahib, in Dehradun, Gurudwara Hemkund Sahib in Chamoli district, Gurudwara Nanakmatta Sahib in Nanakmatta and Gurudwara Reetha Sahib in Champawat district are pilgrimage centres for Sikhs. Tibetan Buddhism has also made its presence with the reconstruction of Mindrolling Monastery and its Buddha Stupa, described as the world's highest at Clement Town, Dehradun. Auli and Munsiari are well-known skiing resorts in the state.