Excavations
C. A. Ralegh-Radford excavated the site in the 1930s, and he also partly restored the two northern circles by re-erecting some stones and placing marker stones in the positions of those missing. The archives from the unpublished excavation reports have been re-evaluated by Jacky Nowakowski (Cornwall Heritage Trust) and John Gould (English Heritage) and this may result in more analysis and publication.
There have been several subsequent investigations of the area. Between 1975-1985 aerial survey and subsequent analysis by various teams, (including thise from Cambridge University, University College London, RCHME and co-ordinated by Cornwall Archaeology Unit) was used to identify and map the features. English Heritage conducted a geophysical survey in 2004. A survey by the Cornwall Archeological Unit in 2009 indicated that there might be a fourth circle present, together with two stone rows.
The Hurlers were scheduled as an ancient monument in 1929, and the protected area was extended in 1994 to include The Pipers.
Read more about this topic: Hurlers