The 340th travelled up on Teslin Lake to Morley Bay – their base camp. They arrived on 18 June joining the 1st battalion from Whitehorse who arrived several weeks earlier.
Teslin Lake is 78 miles long and about 3 miles wide. While the road that would access Morley Bay was under construction, sternwheelers pushed barges loaded with supplies and equipment for the road builders up the Lake to Morley Bay.