Khurdopin is in the west Karakorum. In some books, it has been written that Britain send W.S. Lokhart to Hunza. So, there is a reference of Khurdopin in that journey.
Although, Lieutenant George Cockerill came in this region for survey. And he crossed Khunjarab Pass, and Khurdopin Pass, Khurdopin Glacier, Shamshal Pass and reached Shamshal village. After that Survey, who else visited that area, had used the same track.
Detail About Khurdopin Pass
Days; 15 to 16 days.
Region; Snow Lake, Biafo, Hisper, Khurdopin Pass.
Level; Most Difficult, Technical.
Height; 5700m to 5850m.
Season; July to September.
Track;
(I). Skardu to Askole jeep track, 6/8 hours.
(II). Askole to Mango 6/8 hour
(III). Mango to Biantha 6/8 hours
(IV). Biantha to Karphogoro 4/5 hours
(V). Karphogoro to Snow Lake 4/5 hours
(VI). Snow Lake second camp
(VII). Snow Lake to Khurdopin (High Camp) 5/6 hours
(VIII). Camp after crossing Khurdopin 8/9 hours
(IX). Italian Camp 7/8 hours
(X). Qudrat Camp 8/10 hours
(XI). Chiring Camp 6/8 hours
(XII). Camp after Khurdopin Glacier 6/8 hours
(XIII). Shimshal