Experience Biosphere 2

Tour Schedule & Hours

Guided tours are the only way to experience all that Biosphere 2 has to offer visitors. We are open every day of the year except Thanksgiving and Christmas. The Biosphere 2 Visitors Center and exhibit areas open daily at 9am.

Our guided one hour and 20 minute general tours are offered everyday beginning no later than 10am. The last guided tour of the day begins at 4:15pm. We recommend that you arrive no later than 3:45pm. Upon arrival you will be directed to our exhibits and discovery opportunities, and assigned to one of the next available guided tours.

 Biosphere 2 Holiday Hours (Thanksgiving/Christmas 2017):

  • Closed Thanksgiving Day - Thursday, November 23
  • Open 9am-2pm – Saturday, December 24
  • Closed Christmas Day – Sunday, December 25

We will resume regular business hours of 9am-4pm on Monday, December 26. Please note that we are open regular business hours from 9am-4pm New Year's Eve, Sunday, December 31 and New Year's Day, Monday, January 1, 2018.

See the tours page for information on our public tour offerings.

See the when you visit page for important information on tour policies and FAQs.

See the accessibility page for important information regarding mobility challenges or concerns about walking the one-mile tour route that includes 150 stairs.

For more information please contact (520) 621-4800 during business hours.