Take a left at the first opportunity as you head up Breakneck Pass, stick to the trail, you'll come upon a very old dilapidated log cabin.
Cache container is a Kirkland nut container! Once you arrive at the cabin, the best non-spoiler clue: its in the cabin!
Additional Waypoints
BC1V7HB - Fork in Trail
N 39° 08.907 W 106° 03.728
At this fork in the trail, keep right!