Arizona · 5K
TMC Earth Day 5K at Biosphere 2
TMC Earth Day 5K at Biosphere 2 is a 5K event held in Oracle, Arizona. Its next confirmed date is Saturday, April 17, 2027. About 3,770 runners take part across all distances.
- Race day
- April 17, 2027
- Location
- Oracle, AZ
- Field size
- ~3,770 runners
Race details
- Date
- Saturday, April 17, 2027
- Location
- Oracle, Arizona
- Distances
- 5K
- Field size
- About 3,770 runners
- Registration
- runsignup.com
- Official website
- runtucson.net
Registration, course & weather
- Registration status
- Open
- Start time
- 8:30 AM MST
- Course profile
- Loop course; Road surface
About the TMC Earth Day 5K at Biosphere 2
2027 Registration Open 2026 RACE DAY THANK YOU! Click here for the first post-race email to participants. Thank you for being part of this wonderful event! We hope you had a great time out there today! Results are at this race page or at www.roadrunnerracetiming.com . If you did not pick up your award, you can snag it at The Running Shop (3055 North Campbell) starting on Saturday afternoon at 3:0pm Remaining t-shirts are at The Running Shop (currently, sizes large and extra large), as are the h…
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TMC Earth Day 5K at Biosphere 2: common questions
- When is the TMC Earth Day 5K at Biosphere 2?
- The next confirmed date is Saturday, April 17, 2027.
- Where is the TMC Earth Day 5K at Biosphere 2 held?
- In Oracle, Arizona.
- What distances does the TMC Earth Day 5K at Biosphere 2 offer?
- 5K.
- How many people run the TMC Earth Day 5K at Biosphere 2?
- About 3,770 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the TMC Earth Day 5K at Biosphere 2?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the TMC Earth Day 5K at Biosphere 2?
- Yes — registration is open. $40 (from runsignup.com, checked October 30, 2026).
- What time does the TMC Earth Day 5K at Biosphere 2 start?
- 8:30 AM MST.
- What is the course like at the TMC Earth Day 5K at Biosphere 2?
- Loop course; Road surface.
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