Your are searching for a winter-friendly regular-sized container located at the Murrary Point that is located on an island in Emma Lake.
I walked on water to place this cache. That is, I snowshoed to the hiding location when the lake was frozen solid and was coated by a thick layer of snow. In winter the general location can be approached by just about any manner of winter-lake locomotion, such as snowmobile, skis, or snowshoes. To get close to the cache though, you'll probably want to use a pair of snowshoes to deal with the unsupportive snow layer over the reeds.
When the water is a lot softer, you'll likely need some kind of boat such as a kayak, a canoe, or a motorboat.
The cache contains a pencil, a log, and several tradeables.