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Each spring, nearly 2,000 runners take to the scenic roads from Horsetooth Reservoir to New Belgium Brewing in Fort Collins for one of Colorado’s most iconic races. The Horsetooth Half Marathon takes place on Sunday, April 19, marking another exciting year of endurance, community, and celebration.

A Challenging & Rewarding Colorado Half Marathon

Known as one of the best half marathons in Colorado, this 13.1-mile course delivers a true test of endurance. With steep climbs, fast downhills, and stunning reservoir views, the Horsetooth Half Marathon is both brutal and rewarding.

Runners finish strong at New Belgium Brewing Company, where an unforgettable after-party awaits. Competitive runners will also be chasing a share of the $12,000 prize purse, adding even more excitement to race day.

Train Smarter with Raintree Athletic Club

As the official training partner of the race, Raintree Athletic Club supports runners with the tools they need to prepare for race day.

While training looks different for everyone, Raintree Athletic Club offers over 150 group fitness and small group training classes each week, helping runners build strength, endurance, and mobility. From cardio-focused workouts to strength training and recovery-based classes, these options are ideal for supplementing your half marathon training plan.

Whether you’re preparing for your first race or aiming for a personal best, having access to a variety of professionally coached classes and a supportive fitness community in Fort Collins can make all the difference.

Packet Pickup + Exclusive Runner Perks

Packet pickup will be hosted at Raintree Athletic Club on Saturday, April 18th from 12 PM – 6 PM.

Bonus: All registered runners who aren’t a member of Raintree receive a complimentary 5-day membership to the club, giving you access to top-tier fitness facilities during race weekend.

Spectating the Horsetooth Half Marathon

Not running this year? No problem, this race is just as fun to watch as it is to run.

The Horsetooth Half Marathon encourages spectators to bring the energy with their famous “Golden Rules”:

• Bring noise (cowbells encouraged!)

• Bring signs, costumes, and friends

• Bring the hype, then bring more cowbell

• Stay for the after party

Cheering along the course is a great way to support runners and experience one of the most exciting running events in Fort Collins.

Post-Race Party at New Belgium Brewing

The celebration continues at New Belgium Brewing Company, featuring:

• Free beer for runners

• Live music

• Vendor booths (including Raintree Athletic Club)

• A lively, community-driven atmosphere

And yes, the finisher’s medal doubles as a beer bottle opener, making it one of the most unique race souvenirs around.

Recover Strong at Raintree Athletic Club

After conquering 13.1 miles at the Horsetooth Half Marathon, prioritizing post-run recovery is essential. At Raintree Athletic Club, runners have access to premium sports recovery services in Fort Collins designed to help reduce soreness, prevent injury, and speed up recovery.

Raintree’s Assisted Stretching Program helps improve flexibility, increase range of motion, and relieve muscle tightness after race day. Private Yoga sessions offer guided recovery through mobility work, breathwork, and relaxation, ideal for runners looking to rebalance both body and mind.

For a complete recovery experience, the Recovery Lounge provides a comfortable space to rest, recharge, and recover after intense training or race efforts. These services make Raintree a top choice for post-race recovery, stretching services, and athlete recovery in Fort Collins.

Whether you’re racing, cheering, or celebrating, the Horsetooth Half Marathon is a can’t-miss spring tradition in Fort Collins. We’ll see you at the finish line!