https://www.foxnews.com/travel/couple-visits-disney-world-disneyland-on-same-day-it-was-incredible

That is 6 parks in one day, on both coasts!  Very impressive.  Though I wonder if they actually had time to ride any rides.

Will @malem accept this challenge?

I made it to morning ERT at Kings Island this morning after staying at Cedar Point until close on Friday, managing to ride coasters at both parks on the same calendar day. Close enough?

Six Disney parks on the same day is too crazy for even me. You'd spend more time traveling than actually enjoying anything.

I've done close to similar to this myself with KI and Knott's when I was living in Ohio. Being at KI until close at Haunt (which was near 2am I didnt leave the park), and catching a flight to begin fall vaca in Cali, and was at Knott's at opening. Now it is just Knott's and Siegfried & Roy's Secret Garden and Dolphin Habitat (4 hr drive between), or Knott's and SeaWorld (1 hr and half drive). lol