AZ Onyx by Double Black Events

Fri April 21 - Sat April 22 Fort Mcdowell, AZ 85264 US Directions


Onyx (4-hour)

04/22 7:30AM MST - 11:30AM MST

Onyx Ultra (8 Hour)

04/22 7:30AM MST - 3:30PM MST

Friday Sprint Lap

04/21 6:00PM MST - 9:00PM MST

Race Website

Additional race information can be found at


16300 McDowell Mountain Park Dr
Fort Mcdowell, AZ US 85264


Join us in the beautiful mountainous deserts of McDowell Mountain Regional Park in Arizona to be part of another great Onyx event.  McDowell offers incredible views of the desert landscape, fantastic temperatures, challenging terrain, lots of sandbags, and just enough climbing to keep things spicy.  This April we will be staging in the competitive track area and offer a BRAND NEW course.  Route distances will vary from 1 mile roundtrip to up to 12 miles roundtrip.     

Goal:  Score as many points as possible

​Duration:  4 hours (Onyx), 8 hours (Onyx Ultra)

The Onyx race is our signature event that completely flips the script on what a trail race can be.  Instead of racing for time, participants race for points.  The goal of the race is to score as many points as possible in the given timeframe.  Points are earned by running designated out-and-back routes and bringing back either a sandbag or flag from the turnaround point on any of the routes. 

Each route has different point values.  Flags are worth 1x the route value while sandbags are worth 1.5x.  The longer the route, the higher the point value.  You choose where, how much, and how hard you run for the duration of the race.

Know your strengths, set your strategy, and challenge yourself.


Taking place of the Onyx Half this year is the Friday Sprint Lap.  Join us on Friday evening for a spicy sprint lap on the Black Route of the course.  This will be an 12 mile, out-and-back race.  All racers will be required to carry a sandbag on the return trip.    

For complete info and FAQs on Onyx, visit

  • Ticket for our post-race raffle
  • Free swag
  • Nutrition items from our sponsors
  • Finisher awards
  • Access to well-stocked aid stations and recovery area
  • Access to our awesome venue area equipped with our electronic leaderboard, free product from local vendors, and great music
  • A shot at the podium to win prize money and other awards
  • Access to photos and videos from the race

*Please Note: a $7 entry fee to McDowell Mountain Regional Park is required at the gate by the county.  Card or exact change only.  





Race Contact Info

If you have any questions about this race, click the button below.


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