Interesting, thanks for the link. I got the wrong end of the stick and thought it was a lot shorter.
I need to be back home for 21st, the timing might work, if I'm not too slow!
I think you'd struggle to finish on 20th without pushing it hard.
We will also run L'esperit de Girona (as a) Half this year. So the event will be the first half of the full course. 400km 12000m. Will make for a real nice 4 day gravel adventure. September 7th.
I apologise but I will promote our new event.
If you like beautiful scenery, gravel and quiet tarmac. It's for you.
June 15th Girona.
https://www.lesperitdelbikepacking.org/el-piri-info