Located in the Geikie Creek Valley, 1 km north of Jade Lake. Mount Robson Park, Major headwater Fraser River.
Latitude 52; 40; 30 Longitude 118; 23; 45, Topo map 83D/09
Named by Interprovincial Boundary Survey in 1921. Portcullis is a series of iron bars which blocked the entrance to a castle. Official name.