Walkup Skydome, multi-purpose stadium

Walkup Skydome is an indoor stadium on the Northern Arizona University campus in Flagstaff, Arizona. Its fixed dome is a clear-span timber structure of southern yellow pine, designed by Phoenix architect Wendell Rossman, with a smooth white curved surface and a flat top section. A tan multi-story building with rows of rectangular windows stands in front of it. The arena floor covers 97,000 square feet.

Opened on September 15, 1977, the stadium was unnamed until 1979, when it was named for J. Lawrence Walkup, NAU president from 1957 to 1979. More than half of the $8 million cost came from voluntary student fee increases, with $1.5 million in legislative funding and $2 million from two decades of vending-machine revenue. Its clear-span timber dome, designed by Phoenix architect Wendell Rossman, was the world's largest for six years, until the Tacoma Dome opened in 1983.

The arena sits on the Northern Arizona University campus in Flagstaff, at 6,880 feet (2,095 m) above sea level, so allow for the altitude. Fans enter the east and west concourses, which open onto a panoramic view of the field; three elevators serve the complex after the 2010–2011 renovation. The floor holds 97,000 square feet (9,000 m2) for conventions and trade shows.

The dome is a fixed timber structure of southern yellow pine, not retractable. For six years after opening in 1977 it was the world's largest clear-span timber dome, until Tacoma Dome surpassed it in 1983. The architect was Wendell Rossman of Phoenix.