Longmont’s Main Street will be illuminated by floats twinkling with lights on Saturday, December 11 starting at 5 p.m. Come watch this magical Longmont Lights Parade filled with high school marching bands, amazing floats, costumed characters and much more. This year’s theme is Merry and Bright. The parade lines up along Longs Peak Avenue and Bross Street. Then, it marches on Main St. between 3rd and 8th Avenues.