The Hunt was first established long ago by a Greenfinger called Idamta.
The planet they decided to create the event was then called Gaia, from that moment afterwards.
After the establishment of the colony, then began the long and tortuous process of creating the hunting grounds.
As they, Idamta and the Florans, were excavating the planet, they found some huge caves that weren't connected to each other, with all kind of different landscape and biomes, each with their own wildlife.
Idamta saw the potential of the caves and thus decided to connect the caves with giant metal doors.
It was a long and arduous process, but it was still completed successfully.
The first Great Hunt was a success and the number of geniuses young Florans only rose, year after year, with the help of the caverns.
From that day onward, the caverns were named, Ceremonial Hunting Caverns, by the Florans.
Idamta successfully created the Great Hunt, a test of determination, survival instincts, prowess, and skill; a great trial in which the young Florans could compete to prove themselves the most powerful and mighty hunter.
...
"In my travels, I found a diary that once belonged to Peri. In there, it was said that the Hunt was created by Idamta because he wanted to find a way of "Stopping the young Florans from bickering about who's the best hunter/warrior". There wasn't the whole details of how it came to be since it was written that she heard the story from her grandmother, Akna, who told her about it, and by the time she went to write the diary, she already forgot about the details of the story." Commentary of the book's author, Boriales.
--- Excerpt from the book, "Untold Stories", written by the Explorer Boriales Makintosh, Year 157AR (After the Ruin).