Desert Solstice
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About the race
Desert Solstice Track Invitational is a selective ultrarunning event held December 19–20, 2026 at Camelback High School in Phoenix, Arizona. The event hosts two timed competitions on a 400 meter all-weather track: 24 Hour and 100 Mile.
- 24 Hour
- 100 Mile
For the 24 Hour and 100 Mile entries are limited to 25 runners total and participation is by invitation or qualification only. Qualifying marks must be recent (no older than December 2022) and the standard entry fee listed is $325. Prize money is available for performances that meet specified standards, with different awards for winners and non-winners at various time and distance thresholds.
The course uses electronic chip timing with two timing points per lap, and results for timed events record the furthest distance reached; a separate 100 mile split is shown within 24 hour results. The direction of travel on the track changes every four hours. A fully stocked aid station provides water, electrolyte drinks, and food, and runners are assigned paired 10x10 canopy spaces with two tables and chairs. Portable restrooms are available on course.
Pacers are not permitted. Track etiquette rules require inside-lane running when appropriate, defined passing lanes, and adherence to directions from officials; violations may result in disqualification. Shoes must comply with World Athletics guidelines. Visit the organization's website for the most recent information.
