« All Events

TMC Earth Day 5k at Biosphere 2

April 22, 2023 @ 6:30 am - 9:30 am


Run the Desert . . . then visit a rain forest, view an ocean reef, and wander through savanna grass lands . . . all in one day!
Registration is now open for the 2023 edition of the TMC Earth Day 5k.

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.

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

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.


April 22, 2023
6:30 am - 9:30 am
Event Category:


Biosphere 2
32540 S Biosphere Rd
Oracle, AZ 85623 United States
+ Google Map
View Venue Website
TucsonTopia contains both paid and non-paid mentions of businesses and organizations in and around Tucson, Arizona. Any reference made here to local businesses, services, classes, etc. is for informational purposes only and does not constitute an endorsement. We encourage you to do your own research before participating in an event or engaging with a local business or organization. The intent of TucsonTopia is to provide ideas for family-friendly activities, events, and resources. Participants assume all risks for any activities they engage in. TucsonTopia is not responsible for any injuries or problems that may arise from partaking in any of these events and activities.
© 2012-2024 TucsonTopia - All Rights Reserved | Privacy Policy