- Katrina Harding, Ellen Harding, Michael Harding
- 7.44 m X 9.55 m X 1.11 m dimension(s)
- United States (Half Moon Bay)
The largest ball run/gravitram measures 7.44 m (24.4 ft) tall, 9.55 m (31.34 ft) long, 1.11 m (3.66 ft) wide, and was achieved by Katrina Harding, Ellen Harding, and Michael Harding (all USA) in Half Moon Bay, California, USA on 19 May 2016.
The gravitram was open to the public to use.