MULTIDAYRUNNING
🕐 24-HourUSATF

Desert Solstice Track Invitational

An elite invitation-only 24-hour and 100-mile track race at Camelback High School. Limited to 25 runners with qualifying standards. Organized by Aravaipa Running.

Official WebsiteBack to Events

Event dates, entry rules, qualification standards, and course details can change. Always verify current information on the official event website before registering or booking travel.

Event Overview

DateDec 19-20, 2026
Location🇺🇸 Phoenix, Arizona, USA
Format24-Hour
TerrainTrack
RegionNorth America
Elevation gain0 ft per loop
Cutoff24-hour race ends at 8:00 AM Sunday; 100-mile runners share the same track event.
Start8:00 AM Saturday
Field sizeLimited elite field for the combined 24-hour / 100-mile race.
SanctioningUSATF
HighlightsElite Invitational, National Records Venue

Course & Terrain

Elite 24-hour and 100-mile race on the 400 m all-weather track at Camelback High School.

Key course features to know before comparing this race:

  • Record-focused 400 m track event
  • Direction changes every four hours
  • USATF and IAU record-submission timing procedures
  • Live splits and livestream coverage

A flat track creates ideal record conditions, but track etiquette, lane discipline, and repetitive loading are central to race execution.

Phoenix in mid-December is usually mild but can be cold or wet; the organizer notes past rain and recommends being ready for wet, cold conditions.

Entry & Logistics

RegistrationApplication-based entry through UltraSignup; no charge until acceptance is confirmed.
Application windowRegistration closes December 14, 2026 at 11:59 PM MT.
QualificationInvitation or qualification only, with recent qualifying marks used for acceptance.
Entry fee$325 before taxes and UltraSignup fees.
Support modelFully stocked aid station with water, electrolyte drink, food, volunteer help, chip timing, electronic display, and assigned canopy/table space.
Crew / pacersPacers are not permitted. Crew can support from assigned areas with quick track access.
Logistics noteRunners receive trackside space, but should still plan crew workflow, personal nutrition, shoe compliance, and record-attempt rules before arrival.

Why This Race Matters

Desert Solstice Track Invitational is a useful reference point for runners comparing 24-hour events. Its format, terrain, and support model shape the kind of preparation required: not just fitness, but pacing discipline, nutrition planning, foot care, and the ability to make good decisions under fatigue.

Current benchmark performances listed in the race data:

  • National records set at Desert Solstice: 101
  • World records set at Desert Solstice: 15

Best Fit

  • Elite ultrarunners chasing 24-hour or 100-mile standards
  • Athletes targeting national-team qualification or records
  • Runners who can handle a small, high-performance track field

Planning Notes

  • Build your plan around hourly distance targets, not moment-to-moment pace. In 24-hour races, controlled walking and quick aid stops usually beat early speed.
  • Flat, repetitive surfaces make pacing simple but increase repetitive-load stress. Rotate shoes and schedule foot checks before problems become visible.
  • This is not marked as a beginner-friendly event. Confirm qualification standards, support rules, and registration requirements before building a season around it.
  • Entry is selective and performance-based
  • Pacers are not allowed
  • World Athletics shoe rules and USATF competition rules can affect record attempts

Event FAQs

Is Desert Solstice open to any runner?

No. Desert Solstice is an invitation or qualification-only elite track event.

Are pacers allowed at Desert Solstice?

No. The official event rules state that pacers are not permitted.

Sources

  1. Official Desert Solstice page — https://www.aravaiparunning.com/desert-solstice/
  2. Multiday Running event directory data, last reviewed June 2026.