Like several other volcanoes in northern British Columbia, Level Mountain was volcanically active during past glacial periods. Its involvement with glaciation resulted in several interactions between magma and ice, affording multiple examples of glaciovolcanic processes. Evidence for contemporaneous volcanism and glaciation is widespread throughout the mountain. This includes interlayered unconsolidated fluvioglacial and tuffaceous deposits, tills and glacial erratics at the base of tuffs and lava flows, lahars composed of till and agglomerate, tuyas on the uppermost surface of the shield and as outliers, till cemented by siliceous sinter and the presence of freshwater pillow basalts and volcano-glacial tuff breccias. It is possible that geothermal outputs at Level Mountain had an influence on dynamics of past ice sheets much like the modern Grímsvötn caldera is an important heat source beneath Vatnajökull in Iceland. However, like other large NCVP volcanoes, much of Level Mountain was formed prior to glaciation.