rt138State Route 138 (SR 138) is an east–west state hhway in the U.S. state of California that generally follows the northern foothills of the San Gabriel Mountains and the western MojaveRT 138 Cafe, located at 21224 IL-138, Mount Olive, Illinois, 62069, is a delhtful cafe that offers a range of service options for its customers. Whether you prefer takeout or dine-in, RT 138 Cafe