The Kansas City Backyard Ultra returns to Mill Creek Park on the Country Club Plaza in Kansas City, Missouri on August 7th through August 9th, 2026. This unique running event challenges participants to complete a series of one-mile loops around the park every hour until only one runner remains standing. The race has been an annual tradition since its inception and is part of the Backyard Ultra Series. On race morning at Mill Creek Park, runners will find themselves starting near the J.C. Nichols Memorial Fountain with clear views of W 43rd Street and Broadway Boulevard. The park's trail surface consists of mondo-like material that keeps participants on a clearly marked path through the historic area known for its role in powering local mills during the 1800s. The Kansas City Backyard Ultra is steeped in tradition, drawing runners from across Missouri to test their endurance over multiple hours starting late Friday night. Participants have included both seasoned ultrarunners and casual athletes eager to participate in a unique challenge. The race supports the Backyard Ultra Series' mission of promoting community engagement through extreme running events. The course loops around Mill Creek Park's trail, where runners will complete four laps totaling one mile per loop before starting another hour-long cycle if they finish within time limits. Aid stations and crew support are not allowed during each lap once it begins; however, participants can rest or refuel at the start/finish area between cycles while adhering to strict rules about maintaining presence in the corral. Weather conditions on race days typically feature a temperature range from 20.5°C to 30.4°C with an average of 25.5°C and humidity around 70%. The risk of rainfall is minimal, averaging only 3.3mm over an extended period that includes approximately eleven hours of sunshine daily during August in Kansas City.
3hrs 3 Hours • Start: 07:00:00 • Fee: $50.00
Last Runner Standing Start: 19:00:00 • Fee: $170.00
12hrs 12 Hours • Start: 07:00:00 • Fee: $120.00
6hrs 6 Hours • Start: 07:00:00 • Fee: $70.00
9hrs 9 Hours • Start: 07:00:00 • Fee: $90.00
The race offers various entry options including a three-hour challenge for $50.00, a six-hour option priced at $70.00, and a nine-hour run costing $90.00. Additionally, participants can opt to pay $120.00 for the twelve-hour event or enter the Last Runner Standing competition for $170.00. Registration for the Kansas City Backyard Ultra is available at https://ultrasignup.com/register.aspx?did=130752 with fees increasing based on duration of participation and deadlines enforced to ensure course readiness. Bib pickup will occur at W 43rd Street & Broadway Boulevard from August 6th through race morning, requiring registrants to show their confirmation email. Participants must check in at the start location address: W 43rd St &, Broadway Blvd before starting each hour-long loop and adhere strictly to age requirements of eighteen years or older. First-time runners should arrive early enough to familiarize themselves with park layouts and rules for successful completion throughout multiple cycles if possible. The Kansas City Backyard Ultra in Missouri on August 7th through 9th, 2026 is an endurance challenge that attracts athletes looking to push their limits over several hours at historic Mill Creek Park. This event embodies the spirit of resilience and community found within ultrarunning culture while providing a unique setting for testing personal boundaries amidst familiar Kansas City landmarks.
Races Offered
3hrs
Aug 07, 2026
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Distance —
3 Hours
terrain
Type —
Running
timer
07:00
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$50.00
Last Runner Standing ( 6.7km loop )
Aug 07, 2026
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Distance —
6.7K
terrain
Type —
Running
timer
19:00
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$170.00
12hrs
Aug 08, 2026
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Distance —
12 Hours
terrain
Type —
Running
timer
07:00
sell
$120.00
6hrs
Aug 08, 2026
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Distance —
6 Hours
terrain
Type —
Running
timer
07:00
sell
$70.00
9hrs
Aug 08, 2026
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Distance —
9 Hours
terrain
Type —
Running
timer
07:00
sell
$90.00
Weather History
These values represent the 3-year monthly averages for August in Kansas City.
thermostatTemperature
20.5° / 30.4°
wb_sunnyFeels like
21.6° / 31.5°
light_mode
Avg sunshine hours
11h 12m
water_drop
Avg rainfall
3.3 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
9.6 km/h (Light breeze)
opacity
Sweat loss rate
Very high
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
High (7.0)
humidity_mid
Humidity
70.1%
wb_twilight
Sunrise
06:32
nightlight
Sunset
20:10
About Kansas City
Learn more about the host city, Kansas City.
Kansas City is a major Midwestern metropolitan area that spreads across the border of Missouri and Kansas. It is a city that tends to hide itself from tourists. Reputed to have more boulevards than Paris and more fountains than any other city in the world except for Rome, it can be a beautiful city, too. It is unique in that it is split down the middle by the state line of Kansas and Missouri.
