Gridiron was a steamboat landing and woodyard on the lower Colorado River in Sonora state of northwestern Mexico,.

It supplied fuel wood to heat the steam boilers of the shipping steamboats on the Colorado River from 1854 to the late 1870s.

Geography Gridiron was located above Port Famine, and below Ogden's Landing.Richard E. Lingenfelter, Steamboats on the Colorado River, 1852-1916, University of Arizona Press, Tucson, 1978, p.167 Richard E. Lingenfelter, Steamboats on the Colorado River, 1852-1916, University of Arizona Press, Tucson, 1978 , p.12 Gridiron lay along the east bank of the river below what is now the Sonora/Mexico—Arizona/U.S. border. Geological Map No. 1. Prepared by J.S. Newberry, M.D. Geologist to the Expedition. Explorations and Surveys. War Department. Map No. 1. Rio Colorado of the West, explored by 1st Lieut. Joseph C. Ives, Topl. Engrs. under the direction of the Office of Explorations and Surveys. A.A. Humphreys, Capt. Topl. Engrs. in Charge, by order of the Hon. John B. Floyd, Secretary of War. 1858. Drawn by Frhr. F.W.v. Egloffstein. Topographer to the Expedition. Topography by Frhr. F.W.v. Egloffstein. Ruling by Samuel Sartain. Lettering by F. Courtenay. from davidrumsey.com, accessed October 27, 2014.

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