Almost immediately after Tam's death it was urged throughout Oregon that in commemoration of him and his work some geographic feature in the state be given his name. In time there was chosen the then unnamed broken caldera above Three Creeks Lake in Central Oregon, and with the approval of the United States Board on Geographic Names it now bears the name "Tam McArthur Rim." Just east of Broken Top and the Three Sisters, the rim is a prominent feature of the Central Oregon landscape.
A most befitting finale was enacted on a warm, sunny day in August of 1954. Robert W. Sawyer, a close friend, and Lewis Linn McArthur, a son, together with other relatives and friends, journeyed westward from Bend, Oregon, toward Broken Top Mountain. There on Tam McArthur Rim they complied with his last request by scattering his ashes.
Thus was concluded a ceremony symbolic in several ways, chief of which was the comparison between the rugged Cascade Range and the rugged mentality of Tam McArthur—even to his dying day. And there amidst the eternal solitude of the Cascade Range may his great soul rest in peace forever!
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