2026 - TMC Earth Day 5K at Biosphere 2
2026 distances
Running
TMC Earth Day 5k Run/Walk
5k Run or Walk on the grounds of the Biosphere 2
Children's 5k Discount
Please note that all children will run in the same 5k race as everyone else -- this is not a separate event, but it is just a way to make this event more affordable for families. $10 price for children 14-and-under: includes race number, timing, and entry to Biosphere 2, but no t-shirt. If you want your child to receive a race shirt, please enter them in the regular 5k event.
Race-day weather
Conditions on April 18, 2026 — historical Open-Meteo data.
The sun rises at 5:49 AM and sets at 6:55 PM local time (MST) in Oracle on April 18, 2026 — 13h 05m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Oracle
Different organizers, within 40 miles, in the next three months
Oracle Run
Sabino Canyon One Mile FitKidz Classic
Everyone Runs Catalina State Park 50-Year Trail Race and 5k Trail Run & Walk
Everyone Runs Veterans Day Catalina St. Park 10.6 & 5.3 Mile Trail Races + 5k Road Run
🏃 Plan Your Next Race in Oracle
Find upcoming events by distance:
- Oracle Running Calendar 2026 2 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 2 Oracle events
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