The Round Valley Ensphere (also known as the Tot Workman Dome) is a wooden-dome stadium in Eagar, Arizona, USA.

TEP, at the time facing financial issues, sued to block construction, but trial and appellate courts rejected the lawsuit.

It was forced to stop for three months for reinspection when two workers were hit by wooden beams and fell 75 feet to their deaths.

[2] The dome held its first football game on October 11, 1991, featuring the Payson High School Longhorns.

[9] The Ensphere encloses 8,000,000 cubic feet (230,000 m3) of space and was the first fully day-lighted dome of its kind, allowing light and heat to enter.