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2022 TMC Earth Day 5K at Biosphere 2...

  • 5K Run/Walk:- Run 3.1 Miles
Saturday, April 23, 2022
Start Time
7:30 am
Entry Fee
32540 S. Biosphere Road

_ The 2022 TMC Earth Day 5K at Biosphere 2:

April 19 Update: Click here for the most recent pre-race email to all race participants, with details on the race weekend schedule and activities.  Click here for the KGUN Morning Blend interview about the TMC Earth Day 5k at the Biosphere 2. Run the Desert . . . then visit a rain forest, view an ocean reef, and wander through savanna grass lands . . . all in one day! Join us at the inaugural 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.  APRIL 7 UPDATE: A NOTE ABOUT THE GIVEAWAYS: 1) As of April 6th, we've reached the 400-person cap for a guaranteed race medal, so all registrations AFTER April 6th will be guaranteed a t-shirt, but not a medal. If you are among the first 400 registrants who registered before April 7th, you will be able to pick up your medal and shirt at packet pick-up before the race and on race morning.  After the race, remaining medals will be available to all registrants, including those who registered after April 6th. 2) We've ordered 500 race shirts, so there are plenty of shirts available.  T-shirts will be given away on a first-come, first-served basis at packet pickup.  Packet Pickup 3:00 pm - 6:00 pm Friday, April 22nd at The Running Shop, 3055 North Campbell Avenue, Tucson 6:30 am - 7:15 am Saturday, April 23 at the Biosphere 2 entrance at the main parking lot All participants receive the following:

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 [email protected].  Saturday, April 23rd Updated 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 [email protected].    

Other Info

-) 2022 race registration is open • Registration Information 


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