Moth or butterfly?

I was lucky enough to be invited to go with three friends to the mountains in Kananaskis for the whole day today. The University of Calgary had a Biogeoscience Open House at their Field Station near Barrier Lake today. The weather was absolutely perfect, until we drove home and the sky blackened quickly. Had some hail in my area this evening. We viewed the various exhibits at the centre and thoroughly enjoyed (was it really THREE times?) the fresh fruit salad, pastries and coffee. Afterwards, we went for a botany walk in the area, including through the woods that edge Barrier Lake and the various plants were recorded. This butterfly or moth was seen at the edge of the woods along the edge of Barrier Lake. We'd love it if someone is able to suggest an ID!