Here is a BC Ministry map from around 1970 that I found in the Vancouver Public Library while researching the North Shore Mountains book, showing a trail from the col between Deeks and Windsor continuing north to the Capilano Mountain Trail and Marion and Phyllis Lakes. No doubt wildly overgrow, but on my to-explore list.
Looks like that trail raps around the north ridge of the sub summits around Deeks Peak. That would definitely be an interesting route to check out as the ridge looks pretty narrow on google earth. Would also be cool as the HSCT is built off walking along these alpine ridges. Nice find!