The Mahaffie Stagecoach Stop and Farm Historic Site, locally known as the Mahaffie farmstead, is located in Olathe, Kansas. The house was originally a stop along the Oregon and California Trails, which originated in nearby Westport, Missouri. The house's heyday came with large numbers of westbound travelers of the 1860s. The original farm was founded by James Beatty Mahaffie and his wife Lucinda, in 1858. They ran it until 1870 and stayed on the farm until 1886. The existing house was completed by Mahaffie in 1865. It includes two foot thick limestone blocks quarried from the farm itself.