Washington County Historical Society has been the dedicated guardian of the county's notable history for 50 years now. But the society's roots reach much further back than 1956, when the present organization incorporated. Many of the thousands of immigrants who poured into what is now the State of Oregon over the Oregon Trail settled, ultimately, in what is now Washington County. For most this was a remarkable life-defining experience that demanded to be memorialized and remembered. Thus it was that people began to form groups, gathering to share stories of the trail, to reminisce, and to celebrate their mutual unique accomplishment.