Stonehenge 181
Image by GLADMAN

They could hold the pole vault at Stonehenge. 100m up the cursus.

There must be other megalithic games venues they could use

Now you are talking.

Re-build Coneybury and its a cycle track.

There is a theory about the Avenue originally being flooded - good place (is it?) for the Pentathlon swimming event. Barrows for hurdles (with water jumps). Run around the whole complex for the Marathon.

And in a few more years, how about Silbury for the Winter Olympics?

There's always the X-Games!