This is a good 4 hour drive from Leh towards Kargil on the old road.
Be prepared for warm and cold weather. Also note that due to the height of the region the oxygen is very thin and acclimatisation is required.
Darchik is a small village township in LAdakh. Historian believe that this is the only place where authentic Aryans settled. It is said that soldiers from Alexandra the great's armies who lost there way on their return to Greece settled in this valley as it was the only fertile land in this rugged mountainous region.