The Maryhill Stonehenge is a replica of England's Stonehenge located in Maryhill, Washington. It was commissioned in the early 20th century by the wealthy entrepreneur Sam Hill, and dedicated on 4 July 1918 as a memorial to the people who had died in World War I.
The memorial is constructed of concrete, and construction was commenced in 1918 and completed in 1929.
To run around the Maryhill Stonehenge is about 120m. This is a fixed time FKT: How many laps can you do in 1 hour? (And how are you going to keep track of them?)