Coming March 25, 2018. Happy Spring! It’s the first day of Spring today, and here’s a race to help you celebrate it this coming weekend. The Spring Equinox Half Marathon and 4 Mile in Fort Collins, Colorado starts and finishes at The Biergarten at Anheuser-Busch Brewery. Expect a mix of paved and dirt country roads over a mostly flat, out and back course for the half marathon distance, and a loop course on paved road for the 4 miler. Following the race, celebrate with food and beverages at the indoor Biergarten.