The Falls Mountain occurrence is located between Falling and Willow creeks, just north of Falls Mountain and approximately 39 kilometres west-southwest of the community of Chetwynd.

Coal seams are found in the Lower Cretaceous Gething Formation (Bullhead Group) interbedded with sandstone, shale, carbonaceous mudstone, and minor conglomerate. The coal, at least 3 metres and possibly up to 5 metres thick, is medium volatile, low sulphur, low ash coking coal. Occasional thin coal seams also occur in the Cretaceous Gates Formation of the Fort St. John Group.

The structure consists of a gently west-dipping monocline (dips 5 to 30 degrees). It may be interpreted as a syncline with a northwest-trending axis through Falls Mountain. The detailed structure is complex and faults may be common.

In 1975, a geological examination and results from a 198.4 metre deep diamond-drill hole (D75-01) indicates that the Gething Formation is for the most part at depths with more than 457 metres of cover. In addition, the Gething Formation does not outcrop on the coal licenses held by McIntyre Mines. Access to any limited coal reserves which might be found at mineable depths would be very difficult and the structure both along Willow Creek and Falling Creek is complex in detail and no large areas of undisturbed coal measures would be expected.

In 1975, exploration work was carried out by McIntyre Mines Ltd. in an attempt to locate an economically viable coal deposit of metallurgical grade coking coal on coal licenses in the Falls Mountain area. Surface mapping and diamond drilling indicated the reserves of coal to be deeply buried and probably much more geologically disturbed than initially believed. The company stated that "no good prospect for mineable coal reserves exists and it was recommended that the licenses be relinquished".