A Union Pacific Railroad steam locomotive will pass through Lawrence on Saturday on its cross-country journey celebrating the railroad’s 150th anniversary.

Locomotive No. 844 will leave Topeka’s Great Overland Station at 10:45 a.m. Saturday on its way to Kansas City, Mo. Mark Davis, a spokesman for the company, said that the UP 150 Express will pass by the Union Pacific Depot, 402 N. Second St., about 11:30 a.m. It will not stop in Lawrence but will be available for viewing Saturday afternoon through Sunday at Union Station in Kansas City, Mo., 30 W. Pershing Road.

The train can be tracked through GPS updates at upsteam.com and at Twitter.com/UP_Steam.