Kaza is the district headquarters of Spiti district in Himachal Pradesh. It is accessible from Manali and Shimla. The road from Shimla via Rekong Peo is in theory an all-season one, while the Manali road via Rohtang and Kunzum passes is passable only in summer. There is only one Government bus service from Manali to Kaza but the road is pretty inaccessible with frequent landslides along the way. Due to lack of proper roads in this section of the Himalayas, it is advisable to hire a private MUV Tata Sumos from Manali to reach Kaza.
Himachal Road Transport Corporation buses link Kaza with Manali and Rekong Peo. The Rekong Peo connection passes through landslide area at Malling Nullah, with transhipment crossing on foot and being picked up by a bus on another side being frequently the only way of passing the landslide.
The route from Manali via Losar crossing Kunzum La and Rohtang La along the Chandrataal river is perhaps the most beautiful. The road surfaces are very poor - the entire stretch has never been metalled/tarred. But on asking a local person about the road quality, he'd say that the road is a "good road". You will have to cross about a score of streams flowing across this State Highway No. 30 which could be about a couple of feet deep.The HP Road Transport bus from Kulu to Kaza via Manali reaches Manali around 4.45AM and leaves at 5.00AM to reach Kaza any time in the afternoon or in the evening on the same day depending upon the road conditions,and it costs you only INR228 oneway per person as of AUG 2012.