Carson joined Freemasonry in the Santa Fe Territory of New Mexico petitioning in Montezuma Lodge No. 101. He was initiated an Entered Apprentice on April 22, 1854, passed to the degree of Fellowcraft June 17, 1854, and raised to the sublime degree of Master Mason December 26, 1854, just two days after his forty-fifth birthday. Kit, together with several other Freemasons in Taos, petitioned to Charter Bent Lodge No. 204 (now Bent Lodge # 42) from the Grand Lodge of Missouri AF&AM, a request which was granted on June 1, 1860, with Kit elected Junior Warden of the lodge.