This cache has been placed with permission from Saskatchewan Provincial Parks. Enter the visitor centre via the front door of the building, and ask the staff for the container which is kept behind the counter. As such, access to the geocache will be limited to the hours the visitor centre is open. You're looking for an ammo-can container. ;)
While visiting, you might like to inquire about any temporary geocaching programs that might be happening in the park during the time of your visit.
A bit of history:
Kenosee Lake’s iconic stone Chalet, originally named ‘The Moose Mountain Chalet,’ has sat on the lakeshore since Moose Mountain Provincial Park’s inception. From a picturesque vantage point along the Main Beach, the building itself was at the heart of the Province of Saskatchewan’s earliest plans to build a province-wide park system.
Despite the building’s long history, it was only in 2012 that ‘The Moose Mountain Chalet’ was recognized as a Provincial Heritage Property. Saskatchewan Parks maintains that the building, and the surviving 4 of 14 adjacent cabins constructed in 1932, are “directly associated with the creation of the Saskatchewan provincial parks system.”
To everyone’s great dismay, the new Chalet burned to the ground in the fall of 1933 after only one summer in operation. The stone masonry comprising the exterior walls of the building, however, remained intact following the fire. This permitted reconstruction work to commence almost immediately, thus re-building the Chalet precisely to its original specifications and allowing it to reopen for the following summer season of 1934.
The Chalet operated as an upscale hotel and restaurant for roughly fifty years, solidifying its place at the centre of the Moose Mountain community. The hotel rooms at the Chalet were retired from service in 1981, and the second floor was redesigned to house the park administration offices, where they continue to reside. The restaurant area of the first floor was repurposed in the 80's as the park’s Visitor Centre, which continues to serve Moose Mountain Provincial Park to this day!

The Moose Mountain Chalet as it first appeared in the early summer of 1933.