The Chippewa National Forest in northern Minnesota is celebrating its 90th anniversary this weekend. Minnesota Public Radio's Tom Robertson takes a look at the history of the forest, and why thousands of visitors come back year after year. Teddy Roosevelt was in his seventh year in office when the Chippewa National Forest was established in 1908, the first national forest reserve established east of the Mississippi River. It followed a heated debate between the logging industry, eager to harvest the timber, and a growing number of conservationists who believed strongly in setting the lands aside. With the help of the Minnesota Federation of Womens Clubs, the conservationists were victorious in establishing what was then known as the Minnesota National Forest.