Pioneer Harvest Fiesta President Allen Warren (left) and Fort Scott city worker Shawn Judson put up signs on Monday advertising the 51st Annual Pioneer Harvest Fiesta on the walking bridge that spans the intersection of U.S. Highway 69 and Sixth Street. The celebration of late 19th and early 20th century gas and steam engines and other vintage farm equipment, begins at 6 p.m. Thursday with a downtown parade and continues through Sunday at the Bourbon County Fairgrounds near the corner of 23rd and Horton streets.