Colorado athletes who run the half marathon in the Denver Colfax Marathon race weekend will have the chance to compete for $22,560 in prizes. Registration is now open for the 2025 Denver Colfax Marathon. The city’s only marathon weekend will take place May 16-18, 2025. The first 500 runners to sign up for a race will receive the lowest prices of the season, saving up to $80 on registration fees. The Denver Colfax Marathon is now the largest marathon weekend in the 8 state Rocky Mountain Region. The race weekend features eight races over two days: A Saturday morning 5K, followed by the marathon, marathon relay (four divisions), half marathon and urban 10 miler on Sunday. More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.