List of National Natural Landmarks in Arkansas

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From List of National Natural Landmarks, these are the National Natural Landmarks in Arkansas. There are 5 in total, 4 are forests, 1 is other (spring).

Name Image Date Location County Ownership Description
1 Big Lake Natural Area 1974 Mississippi federal Forest area within Big Lake National Wildlife Refuge.[1]
2 Lake Winona Research Natural Area 1976 Saline federal Pine forest near Lake Winona, water supply lake on Alum Fork of Saline River. Part of Ouachita National Forest. [2][3]
3 Mammoth Spring Mammoth spring (47).JPG June 1972 Mammoth Spring 36°29′52″N 91°32′09″W / 36.4978°N 91.5359°W / 36.4978; -91.5359 (Mammoth Spring) Fulton state The largest first magnitude spring in Arkansas, it is connected underground to another Natural Landmark, the Grand Gulf State Park in Missouri. It is protected as a state park.
4 Roaring Branch Research Natural Area 1976 Polk federal Steep ravine with a virgin forest in Ouachita National Forest. [4]
5 White River Sugarberry Natural Area 1974 Desha federal Virgin hardwood bottomland forest in White River National Wildlife Refuge. [5]