Seth Landqvist (8 August 1882 – 2 April 1945)[1] was a Swedish long-distance runner.
[2] He competed in the men's marathon at the 1908 Summer Olympics, but failed to finish.
[3][4] He also competed in the men's five miles, finishing ninth.
[1] Landqvist competed for the athletics clubs Fredrikshofs IF and Östermalms IF.
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