Half Marathon races near Castle Pines

The Spooky Sprint - Denver is a Halloween-themed road race held annually at Chatfield State Park in Littleton, southwest of Denver. As part of the Bodies Race Series, it offers a family-friendly setup with options for a 5K, 10K, half marathon, or an untimed 1 Mile. Younger children have their own untimed dash. The in-person races feature chip timing with live results and awards, and a virtual option allows participants to run independently while still receiving event merchandise. The race course is a road race within Chatfield State Park, with distances from a 1-mile family option to a half marathon. The expected attendance is in the hundreds, suggesting a focus on local runners, families, first-time racers, and those seeking Halloween-themed fun, rather than a large-scale urban event. Registration includes a custom bib, a designer shirt, and a finisher medal, along with complimentary participant photos and post-race treats. Children aged 10 and under can participate in the dash for free without merchandise. The 5K and 10K events provide reduced pricing for participants aged 12 and under.

Philip S. Miller Park and the Ridgeline Open Space in Castle Rock serve as the setting for this trail festival, challenging runners on Castle Rock's extensive ridgeline trail system. This event is an athletic gathering, combining serious trail pursuits with a strong community and family spirit. Runners will navigate the varied terrain of the ridgeline trail system, experiencing the natural contours of Philip S. Miller Park and Ridgeline Open Space. Beyond the main races, the liveBIG Family Adventure Run offers a dedicated family obstacle course for children ages 5 to 12, ensuring an engaging experience for younger participants and an inclusive atmosphere.

The Westy Half & 5k is a fall running event in Westminster, Colorado, located at 10600 Westminster Boulevard. It features two distances: a half marathon for those seeking a longer morning run, and a 5k for participants preferring a shorter race. The event is part of the Hometown Race Series, which organizes half marathons and 5k races in communities outside the primary Denver and Boulder metro regions. A notable aspect is the 5k medal policy: all 5k finishers receive a medal, a practice that remains infrequent for this race distance.

Turkey Trails Denver is an annual Thanksgiving-themed running event in Denver offering a half marathon, 10K, 5K, 1 mile, and a Kid’s Dash. It accommodates various participants: adults can select a longer timed race, families can opt for a shorter distance, and children 10 and under have their own untimed dash. The half marathon, 10K, and 5K are chip-timed with live results. The 1 mile and Kid’s Dash are untimed. Registrations include a custom bib, designer shirt, and medal. The Kid’s Dash includes a youth-sized shirt and medal. Children can also run the dash for free without swag. The 5K and 10K have youth pricing for ages 12 and under. The finish area provides free photos and treats. A virtual option allows participation remotely while still receiving event gear.

Marathon At The MAC is a self-paced indoor marathon on the MAC walking track. Participants complete 26.2 miles on their own schedule by walking, jogging, or running a total of 208 laps. After each walk or run, participants report their lap count to the MAC front counter staff, so the marathon can be built up over multiple visits. Runners and walkers scan in with a MAC Walking Track Pass when they arrive, participants under 18 need an adult with them, and everyone who finishes the full distance receives a T-shirt.

The Turkey Trek is a Thanksgiving race series held at Long Lake Regional Park in Arvada, offering four distances: a 13.1-mile Half Turkey, the 10k Turkey Trek, the 5k Turkey Trot, and the un-timed 2k Turkey Toddle. The 5k begins at 8:30 AM MST, with the half marathon starting at 8:40, the 10k at 9:00, and the 2k at 9:10. This staggered start accommodates runners and walkers of various abilities throughout the morning. The course ascends to a summit at the 3-mile point, featuring the Egg Nog Chug Challenge where participants can drink 5 ounces of eggnog for a chance to win a new pair of shoes. Following the exposed upper section, the path crosses a ridge for a mile before descending the mesa's east side. The route then transitions to a flatter straightaway with hay bales for the Hay Bale Hop Challenge. This clockwise loop returns to the park, and approximately one kilometer from the finish line, racers encounter the Fill Your Pie Hole Challenge, involving pumpkin pie before the final push. Half marathon finishers are awarded a mug.

Run Denver 'Mile High City' 5K/10K/13.1 is a local Denver running event offering 5K, 10K, and half marathon distances, taking place in late November. It functions more like a supported group run than a large race: each wave is limited to approximately 15 to 20 participants, both runners and walkers are accepted, and timing chips are not used. The atmosphere is intentionally relaxed. Bibs are distributed on race day, participant gifts are mailed out, and organizers can record times by bib number upon request. Waves begin in the morning and are filled sequentially, with a waitlist or virtual run offered once capacity is reached. Participants receive a shirt, medal, and entry into a virtual runner community; the virtual option also includes text-based coaching support prior to the run.

The Thanksgiving Gobble Trot Run 5K/10K/13.1 is a Denver/Aurora holiday race series offering 5K, 10K, and half marathon distances. Organized by The Best Races, it centers on a Thanksgiving morning running tradition: participants can race, jog, or walk before the day shifts to stuffing and turkey. The event welcomes families, friends, and local runners, not exclusively competitive athletes. The core idea is to enjoy the outdoors with others, complete a manageable distance, and burn calories before the Thanksgiving meal.

The All-Out Spring Fever is a spring race held on the Ralston Creek Trail close to Golden, Colorado. Runners can choose between 5K, 10K, and half marathon distances. The courses run alongside Blunn Reservoir in Arvada, offering views of Table Mountain and the Colorado foothills, giving it the feel of a foothills trail run rather than a city race. This event is organized by All-Out Multicourse and serves as the spring complement to their Kooky-Spooky series. The race features a bee mascot named Buzzby, benefits the People and Pollinators Action Network, and offers a chance for participants to qualify for a BOLDERBoulder starting wave. A virtual half marathon option is available for those who wish to complete the distance remotely.