The Lac Rocher district has a very limited exploration history. The first discovery of nickel mineralization in the district occurred in 1960 when Osisko Lake Mines reported a 0.90 metre intercept grading 2% nickel. Subsequent work failed to demonstrate any size to this discovery,and it was not until discovery of the Lac Rocher nickel deposit in 1998 by Nuinsco Resources Ltd. (now Victory Nickel Inc.) that the area saw any significant activity.

The Nuinsco discovery sparked a regional staking rush which lasted only a couple of seasons due to the difficult economic conditions at the time, and the relatively limited size of the discovery.

On the properties now controlled by Balmoral, only two holes have been drilled, both on the RUM North Property One hole was drilled into the central part of a strong magnetic high on the property and confirmed that the high was sourced by an ultramafic intrusion, similar to the Lac Rocher body, but failed to intersect any significant mineralization. Of note, this hole tested the strongest part of the targeted magnetic anomaly which at Lac Rocher is also barren of mineralization, with the nickel sulphide mineralization occurring along the outer margins of the intrusion, which are significantly less magnetic than the core of the intrusion. The second hole tested an EM anomaly with no associated magnetic high and intersected paragneiss.

There is no other work recorded on any of the RUM properties acquired by Balmoral in 2018.