History Great glaciers of the Ice Age bypassed Onalaska, forming the "driftless region" which left the majestic scenery and topography of Onalaska. The steep rocky bluffs, winding valleys, fertile river bottom and great Mississippi River Basin made the Onalaska area appealing for habitation. As early as 8,000 BC, Native Americans lived in small mobile family groups in the Onalaska area. Later,...