Worldwide Half Marathon Calendar – Manually Vetted Races | HalfMarathon.net 2,426 events | HalfMarathon.net

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Jul

25

2026

Aspen, Colorado (United States of America) - "Aspen Valley Marathon". The Aspen Valley Marathon takes place in the heart of the Rocky Mountains. The marathon is a Boston Marathon qualifier, offering runners the opportunity to qualify for one of the most prestigious races in the world. With its stunning natural beauty and downhill course, the marathon is a must-do for any runner or outdoor enthusiast. Runners will traverse a scenic route that winds through alpine forests and past the Rio Grand river ending in downtown Basalt. The race offers multiple options, including a full-marathon, half-marathon, and 5K, making it accessible to runners of all skill levels. After crossing the finish line, runners can celebrate their achievement at the Aspen Valley Marathon's afterparty, complete with live music, champagne, and delicious local food. www.aspenvalleymarathon.com

Sep

27

2026

Boulder, Colorado (United States of America) - "Boulderthon". Experience the magic of Boulderthon presented by lululemon, recently recognized by USA Today as one of the Top 10 races in the U.S. and is one of the fastest-growing races in the country! Boulderthon, presented by lululemon, offers a distance for everyone - a marathon, half marathon, the 10K presented by Cheribundi, the Heart to Heart 5K by BCH, and the Boulder Country Day School Kids Run. The full and half marathon courses feature sweeping views of the Flatirons, Boulder Reservoir, Table Mountain, and Haystack Mountain, before an unforgettable downtown finish on Pearl Street. The 10K runs through Boulder's scenic streets to the same iconic finish, while the fast, flat Heart to Heart 5K includes a $40,000 prize purse - one of the largest 5K purses in the nation. Whether it's your first 5K or your next PR, Boulderthon brings big-race energy with the charm of a mountain town. Crisp fall air, golden leaves, and a Pearl Street finish make it a race like no other. The top-rated, fast-growing multi-distance event became the second-largest race in Colorado in its first year of existence, and the largest fall running event in the state. In its fourth annual edition, Boulderthon drew nearly 10,000 runners from all 50 states as well as 22 countries. This secured its entry into the list of the top 100 largest running events in the country, as reported by RunSignUp. In 2023, Active.com named Boulderthon one of the Top 5 Best Half Marathons in the United States. Benefiting the Community In only its fifth year, the event generated an estimated economic impact of $22.8 million locally and regionally. Outside of race weekend, the organization leads ongoing volunteer and environmental adoption efforts, hosts free year-round community events, and has a program to promote accessibility to racing through no-cost bibs. Packet Pickup - Downtown Boulder, Pearl Street Mall between 13th and 15th Friday, Sept. 25: 1 - 5 p.m. Saturday, Sept. 26: 10 a.m. - 6 p.m. Race Times Sunday, Sept. 27 7 a.m.: Half and full marathon start time 7:45 a.m.: 5K start time 8 a.m.: 10K start time 8:15 a.m.: Kids Run start time Course Amenities Water and Hydration Stations will be staggered approximately every 3-4 miles. Precision Fuel and Hydration will be available at all Water Stations. There will be port-a-potties on course. Awards Information on awards can be found here. https://go.evvnt.com/3599600-0?pid=6562

Oct

03

2026

Colorado Springs, Colorado (United States of America) - "Colorado Springs Marathon, Half, 5K, and Kids K". Join us for the 13th Annual Colorado Springs Marathon on Saturday, October 3, 2026! Whether you're a seasoned runner or taking on your first 5K, we have four exciting race options to choose from. Each course highlights the stunning beauty of Colorado Springs' winding past historic landmarks, through scenic parks, and finishing downtown at the Colorado Springs Pioneers Museum, where a lively post-race celebration awaits. This premier, family-friendly event draws participants from across the country and has sold out five years in a row' secure your spot today! https://runsignup.com/Race/CO/ColoradoSprings/cosmarathon?aflt_token=Nktw0AUB3nF4FPeh7Y7AWqQewFdw9sGt



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