The Leh–Manali Highway (Hindi: लेह-मनाली राजमार्ग Leh-manali rājamarg) is a 490 km (300 mi) long highway in northernmost India connecting Leh in Ladakh in Jammu and Kashmir state and Manali in Himachal Pradesh state. It is open for only about four and a half months in a year in summer between May or June, when the snow is cleared, and mid-October when snowfall again blocks the high passes. It connects Manali valley to Lahaul and Spiti valleys and Zanskar valley in Ladakh. Leh–Manali Highway was designed and built and is maintained entirely by the Border Roads Organisation (BRO) of Indian army. It is capable of supporting the heaviest of army vehicles.