This is Biosphere 2's most comprehensive tour and is available throughout the day. The admission desk will provide tour times and start locations. Because Biosphere 2 is a research facility, the interior portion of this tour is not wheelchair or stroller accessible.
* From central Tucson, go north to River Road and turn left (heading west).
* Continue on River Road and turn right (north) on Oracle Road (Arizona Highway 77).
* Continue north approx. 24 miles on Oracle Road/Highway 77, to Biosphere 2 Road at Mile Post 96.5, and turn right.