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Timing you can Trust!
Racing Underground has been timing and managing endurance events in Colorado since 1995. We offer state of the art timing services for events of all sizes, with a finish arch, large-digit display clock, professional sound system, and backup timing all standard. For running races, we offer disposable bib-tags at no extra charge, and multisport events are timed using a re-useable ankle chip on a soft and comfortable neoprene strap.
Welcome to Racing Underground Timing

Racing Underground has been producing and timing running races and multisport events since 1995. Darrin and Jill Eisman, and their staff, have worked together on more than 1,000 successful events in that time.

In addition to approximately 20 events of their own, Racing Underground provides timing services for a select number of additional races each year. These slots fill quickly, with many events booking their dates a year in advance. Please contact us to see if your date is available for timing by Racing Underground.

Racing Underground uses the RFID Ultra System, developed by RFID Race Timing in Australia. For running races we offer disposable bib-tag timing, while triathlons and other multisport events utilize a re-useable ankle chip on a soft and comfortable neoprene strap.

Standard Timing Package:

  • Chip Timing for your event
  • Inflatable Finish Arch or Metal Finish Truss (style determined on an event by event basis)
  • Large digit display clock
  • Professional sound system with cordless microphone and race music
  • Optional Bib Numbers from one of our partners
  • Race-Day Data Entry
  • Link to your website from our online regional race calendar
  • Results posted throughout the event, and online on race day (typically before we leave the race site if cell reception is available)

Deluxe Timing Package*:

  • All of the above, plus...
  • The Racing Underground "Results Trailer"
    • video results displays
    • results kiosk(s)
    • time-delayed finish line video
  • Printable Finisher Certificates
  • Announcer computer with live feed of finisher data
  • Live Online Results
  • Live Results via Smart Phone
  • Integrated Facebook & Twitter posting

*Items in Deluxe Package may also be requested a la carte.

Please visit our Technology page for details on our timing systems, software, and amazing selection of optional items.

Request a quote today to see how we can make your event a success!