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GMR Backyard Ultra

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Golden, Colorado, United States

calendar_today 23 May, 2026

directions_run Running

language Official Website

sell $50.00

About the Event

Date: 5/23/26

Time: 10:00 AM (check-in starts at 9:00)

Cost: $50.00 + Recommended minimum $25.00 Donation

Non-Profit Recipient: Sun Valley Kitchen and Community Center

The backyard Format: Run one every hour until only one runner remains. Every lap starts at the top of the hour, so you can choose to run your lap fast and get rest in between or run slow and save your energy. This is intended to be a fun event with friends. Come do one lap, or push yourself to the ultra distance if you chose. 4.17 mile lap

Registration is limited to the first 60 signups. The cost is $50. We also recommend a minimum $25 Donation to Sun Valley Kitchen and Community Center. The registration fee will be used to supply aid station items, awards and temporary bathroom facilities (port-a-potties).

Races Offered

GMR Backyard Ultra

May 23, 2026

straighten

Distance — GMR Backyard Ultra

terrain

Type — Running

timer

10:00

sell

$50.00

Weather History

These values represent the 3-year monthly averages for May in Golden.

thermostat Temperature

5.8° / 20.3°

wb_sunny Feels like

2.2° / 16.9°

light_mode Avg sunshine hours

11h 51m

water_drop Avg rainfall

2.8 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.3 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

High (6.0)

humidity_mid Humidity

54.2%

wb_twilight Sunrise

05:45

nightlight Sunset

20:08

About Golden

Learn more about the host city, Golden.

Golden is a city in the Denver Area of Colorado. It sits at the foothills of the Rocky Mountains, and distance-wise is roughly halfway between the cities of Boulder and Denver. It is the home of the Coors Brewery, the Colorado School of Mines, and the Colorado Railroad Museum.