This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley This is a 10 days trekking to the lake Sarez, which is based in Bartang Valley