I heard it takes 15 minutes to ride a horse from end to the other, and that it's around 30 sq mi.That's my feeling with the game. I'm glad they created a game with 64* sq mi of area to explore. I just don't want to ride a ****ing horse for 10 minutes to get to my next mission. My RDR2 time has gone ice cold since Christmas, save for maybe 2-3 hours spread over a few sessions.
* - that's a random number. I have no idea what the actual number is, but I thought I read it was more than 50 but less than 100.
Contrast that with Ghost Recon: Wildlands, where I have taken that long to traverse the map in a helicopter. (With no load screens.)