Race Information

TMC Earth Day 5K at Biosphere 2
Oracle, AZ
Pinal County
Apr 22, 2023 - Saturday
5K run | kids run
  • Information provided by others. We do not confirm or monitor its accuracy.
    Run Tucson's TMC Earth Day 5k Run/Walk at the world-renowned Biosphere 2, nestled in the foothills of the Catalina Mountains north of Tucson. Shirt, music, prizes, & free entry to the Biosphere 2.
  • organized byRun Tucson
  • Details from event's RunSignUp.com listing:
    Run the Desert . . . then visit a rain forest, view an ocean reef, and wander through savanna grass lands . . . all in one day!

    2023 News: Registration is now open for the 2023 edition of the TMC Earth Day 5k.

    2022 News: Click here for the Run Tucson Race Report.  Click here for age group results from our friends at Roadrunner Race Timing. Click here for overall results

    Click here for the Damion Alexander photos.  Click here for the video Damion put together. Click here for the KGUN Morning Blend pre-race interview about the TMC Earth Day 5k at the Biosphere 2.

    Join us at the 2nd Annual TMC Earth Day 5k, where you can walk or run the hidden backroads of the world-famous Biosphere 2, nestled at the base of the majestic Catalina Mountains, north of Tucson. The rolling 3.1 mile course offers gorgeous desert and mountain views, with start and finish on the Biosphere 2 Lawn.  

    Don't miss this chance to visit the earth's entire ecosystem under one roof while celebrating Earth Day.

    All participants receive the following:

    • souvenir t-shirt, celebrating Earth Day
    • official finisher's time with chip timing
    • free entry to the world-famous Biosphere 2
    • discounted entry to spectators, plus free entry for children
    • post-race snacks and goodies

    Age-group and overall awards announced soon

    Bring the Kids! Strollers are allowed at this child-friendly event, with a free Kid's Dash & Kid's Zone

    Do Good! This inaugural event raises funds for the world-renowned Biosphere 2's Ocean Reef Lab. 

    Terrain: mostly pavement, with a brief dirt section

    Difficulty: hilly in sections

    Weather: 50's - 70's

    Differently Abled: Yes, be mindful of hills and dirt road

    Pets Allowed: No

    Want Training Advice? Contact RRCA-certified running coach Tia Accetta at tia@runtucson.net. 

    Saturday, April 22, 2023 Planned Schedule:

    6:30-7:15 am Race day registration and packet pick up
    7:30 Start time for TMC Earth Day 5k Run/Walk
    8:45 Free Kids Dash
    9:15 or so: Awards
    Ongoing: All registrants can visit Biosphere2 on their own -- no need for a formal tour!

    All non-running guests can purchase Biosphere 2 admission for the discounted rate of $11 (before 8:30 am) and all children under 12 are free.

    This event is a partnership between Run Tucson & the Biosphere 2, the University of Arizona

    Questions? Contact Race Director Randy Accetta at randy@runtucson.net.  


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Listing Status

  • Added to our Directory
    Jan 25, 2020
  • Last Updated in our Directory
    Jan 4, 2023
  • Appears in Directories

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