The Clermont Days Centennial Festival will kick off at 4 p.m. Friday, Sept. 20, and continue to Saturday, Sept. 21, as the town celebrates its 100th birthday as a charted township. The “Clermont Cupcake Challenge,” a 5-kilometer run and 1-kilometer fun walk, will start at 7:45 a.m. Saturday. Sign-in is at 6:30 a.m. for the level course with mountain scenery.