Grand Valley Backyard

Grand Valley Backyard

Grand Valley Backyard is a last-person-standing Backyard Ultra held at the 18 Road trail system in Western Colorado. The event uses a repeating loop format where runners attempt consecutive laps until they stop finishing within the allotted time.

The course is a 4.17 mile loop that is mostly singletrack with some doubletrack and no pavement. Each loop has about 500 feet of elevation gain, with most climbing occurring in the first half. The route is described as entirely runnable and non-technical.

Format details: every hour all remaining runners start a new 4.17 mile loop together. A runner who completes the loop within the hour is eligible to start the next loop; missing the cutoff or choosing to stop ends that runner's race. The event continues until only one runner completes a final loop.

Available target distances include:

• One lap (4.17 miles)
• 50K
• 50 miles
• 100K
• 100 miles
• A greater distance than a runner's previous best

Support and logistics are provided at the start/finish area. Water and Proxima C Endurance Fuel are supplied during the race. Runners are responsible for their own additional food and supplies. Crew are welcome with a limit of three people per runner. Each runner may use up to a 10' x 10' personal setup area; pop-up canopies up to 10' x 10' are allowed if secured. The event is cupless so runners must bring a refillable cup.

Finishers who complete at least one loop receive a custom finisher buckle and also receive a tri-blend race shirt, race sticker, and drawstring bag. Ultraverse has organized Backyard Ultras in other states and applies that experience to this event. Visit the organization's website for the most recent information.

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