OKKAMO Tri-State Marker is a monument showing the tripoint of Oklahoma, Kansas, and Missouri. It is located at an elevation of ,Clark, Patterson & Denise Lu "Cornering America's tri-points: A guide to 65 lonely spots where at least three states converge" (Sept. 17, 2015) (Accessed Nov. 29, 2021) though one source says ."#19 KS-MO-OK" Highpointers.org The marker is about north of I-44 and about east of the Downstream Casino and Resort, which is operated by the Quapaw Nation.
A marker built from native stone was erected in 1938 by the WPA, but it is located to the west of the actual tri-point. A stand-on plaque was added in October 2004 at the actual site of the tripoint.Alexander, M.J. "Quapaw's Dueling monuments: Two spots for three states" 405 Magazine (April 4, 2017) (Accessed Nov. 29, 2021)"Stand on three states: Kansas, Missouri, Oklahoma" RoadsideAmerica.com
See also List of Oklahoma tri-points Preston Monument: monument on the Colorado-New Mexico-Oklahoma tripoint Site No. JF00-072: monument on the Kansas-Nebraska border Site No. RH00-062: monument on the Kansas-Nebraska border Texhomex: monument on the New Mexico-Oklahoma-Texas tripoint United States Highway 61 Arch: monument on the Arkansas-Missouri border
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