I found these beautiful snaps on Mountain Club of South Africa website. They did trekking in Spiti in 2000, please pay a visit for more snaps:
An IT professional for 17 years, based in the US since the last 12 years. Founded NGO My Himachal and then Himachal Media Pvt. Ltd.. A Himachali forever. Always trying to bring together people whose hearts beat for the state.
http://the-never-ending-road.blogspot.com/2005/03/himachal-pradesh.html
http://triptoheaven.blogspot.com/