The Arrowhead Library System is offering a limited quantity of free event passes to the July 13 trumpeter Thomas Pfotenhauer concert at Weber Hall on UMD Campus at 1151 University Dr., Duluth at 7:30 p.m. Tickets are available, in limited quantities, at the public libraries in Cloquet, Duluth (Main), Gilbert, Grand Marais, Hoyt Lakes, Silver Bay, and Two Harbors.