The Wasatch Yard Backyard Ultra returns to Round Valley Quinn's Trailhead in Park City, Utah on December 12th through December 14th, 2025. This unique event challenges participants with a series of loops beginning every hour at precisely 7:00 PM each night until only one competitor remains standing. Each loop covers approximately 4.167 miles and must be completed within an hour to advance further in the competition. The race starts under dark conditions, requiring runners to use headlamps from the first lap onward. Aid is provided exclusively at Round Valley Quinn's Trailhead for each start and finish of a loop. The Wasatch Yard has been running since 2019 as part of Park City’s growing ultra-running scene. It attracts around one hundred dedicated athletes annually, with Mount to Coast sponsoring shoes for top performers and middle-of-the-pack runners alike. Participants also receive exclusive discounts from BUFF® on race gear during a special period in December. The course at Round Valley Quinn's Trailhead features varied terrain that includes both firm and slightly soft trails, making each lap unique but challenging. The loop gains about 249 feet of elevation per circuit, adding an extra layer to the endurance test set by the event format. Aid stations are limited strictly to the start/finish yard. Weather conditions in Park City during late fall tend towards cooler temperatures with occasional precipitation. On race day, expect daytime highs around 8.3°C and lows near 2.9°C, feeling like about 7.5°C on average due to wind chill factors. The chance of light rain or snow can be anticipated, though visibility remains good under the provided trail markings.
Backyard ultra Start: 18:00:00 • Fee: $100.00
Participants must register for this event through a dedicated page at https://ultrasignup.com/register.aspx?did=138776 to secure their spot before the field limit of 100 runners is reached. Bib pickup will take place on-site from Friday, December 12th until Sunday, December 14th between noon and midnight. No additional items are required for bib collection. The race begins at Round Valley Quinn's Trailhead where all necessary information about aid stations and course markings can be found upon arrival. Runners should note that the event requires headlamps from Loop 1 onwards due to night running conditions, with no on-course assistance allowed beyond this point. The Wasatch Yard Backyard Ultra in Park City continues its tradition of challenging runners over multiple days through December 14th, offering a unique blend of endurance and camaraderie among participants. The event is particularly notable for the compelling format that tests both physical limits and mental fortitude against time constraints and continuous competition.
Races Offered
Backyard Ultra ( 4.167 mile loop )
Oct 23, 2026
straighten
Distance —
6.7K
terrain
Type —
Running
timer
18:00
sell
$100.00
Weather History
These values represent the 3-year monthly averages for October in Park City.
thermostatTemperature
2.9° / 13.7°
wb_sunnyFeels like
-0.6° / 10.1°
light_mode
Avg sunshine hours
9h 35m
water_drop
Avg rainfall
2.3 mm
ac_unit
Avg snowfall
0.7 cm
air
Avg wind speed
6.2 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
57.5%
wb_twilight
Sunrise
07:38
nightlight
Sunset
18:44
About Park City
Learn more about the host city, Park City.
Park City is a year-round resort town located on the Eastern of the Wasatch Mountains, part of the Rocky Mountain Range in Utah. Altitude in town ranges from 6,720 to 8,460 ft. above sea level. The surrounding Wasatch Mountain rise over 10,000 ft. It is probably best known for its skiing and winter season with three world-class ski resorts: Park City Mountain Resort, The Canyons Resort and Deer Valley Resort - and for hosting the annual Sundance Film Festival.
