Nun Run Half Marathon 10k & 5k

Sunday, September 17, 2023 Centennial, CO

Logo of the Nun Run Half Marathon 10k & 5k in Centennial, CO

Hosted as a charity fundraiser for the Sisters of Life in Denver, the Nun Run Half Marathon, 10k, and 5k is entering its 9th year in support of reaching their annual goal of $31,000. 

Taking place within a beautiful regional park along a 71-mile stretch of canal from South Platte River to Waterton Canyon, the Nun Run Half Marathon enjoys serene natural landscapes throughout. 

Amidst the Rocky Mountains, this course is truly amazing, not to mention it takes place mid-September, so expect the colors of autumn to be in full bloom.

Starting in DeKoevend Park, the Nun Run Half Marathon takes participants along the beautiful High Line Canal. Exiting the park, runners will cross East Orchard Road at mile 2. Onward, runners will cross East Long Road as they persist through Greenwood Village. 

Turning around at Marjorie Nature Preserve, runners will retrace their steps in an out-and-back fashion before ultimately reaching the finish line where the race initially began. 

If you’re worried about fueling, no need to fret. This course has several aid stations throughout to ensure that you perform at your best. This community event is a perfect excursion for the entire family, so be sure to encourage family and friends to come out and support! 

Race Weather & Climate

Centennial is situated in the southern Denver metropolitan area of Colorado, offering a suburban lifestyle approximately 15 miles southeast of downtown Denver.

September 17 in Centennial, Colorado marks the transition from summer to early autumn. High temperatures typically reach around 76°F, offering a pleasant and mild environment for outdoor activities. As the day progresses into the evening, temperatures gradually drop to approximately 49°F, hinting at the cooler nights of the approaching season. Rainfall during this time is relatively low, with an average of just 0.6 inches, making it an ideal day to enjoy the changing colors of fall, perhaps with a hike or a visit to a local park in Centennial.

Nun Run Half Marathon Race Results

2023 Nun Run Half Marathon Race Results

Nun Run Half Marathon Course Map

See the race route map for the Nun Run Half Marathon course map here.

Starting Time

The half marathon start time is 7:30 AM.


To reserve your spot in the 2023 Nun Run Half Marathon 10k & 5k, you can use the registration link here.

Race Fees

Online registration is now closed for this race.

Nun Run Half Marathon 10k & 5k Race Website

Nun Run Half Marathon 10k & 5k Website

See more races in: September, Colorado