Over 1,000 pilgrims of the first batch of the 2015 annual Amarnath Yatra left Jammu on Wednesday for the high-altitude cave shrine in Kashmir Valley. State health minister Chowdhary Lal Singh flagged off a convoy of 34 vehicles carrying 1,280 pilgrims from Bhagwati Nagar Yatri Niwas in Jammu towards the valley.