G.W. Marks Exploration Center in the Balsamroot room Missoula, MT Email Address: G.W. Marks Exploration Center in the Balsamroot room 1075 South Ave W Missoula, MT Region: Missoula Upcoming events at G.W. Marks Exploration Center in the Balsamroot room Jul 15 Tue Open AIR: Eleanor Qull & Deborah Dohne Artist Presentation Jul 15 Missoula G.W. Marks Exploration Center in the Balsamroot room Art & Exhibits Lectures