Old church in Lost Springs, Kansas. Lost Springs is located in northeastern Marion county. The city park has an impressive red stone marker (with bronze plaque) describing the Santa Fe Trail which passed though here. A few miles west of Lost Springs is the site of the old Lost Spring, a well-known campsite on the Santa Fe trail. Highway 77 runs just east of town, and the UP and AT&SF railroads intersect at the northeast corner of town. The population was 71 at the 2000 census.