Hello everyone. The aspect ratio of 21:9 or wider is not properly supported in this game. When choosing a widescreen resolution, black stripes remain on all sides and it is impossible to play like this.

But you can fix it and run the game in a 21:9 aspect ratio.

Here is the steps:
1) Go to this link: https://www.gamepretty.com/the-quarry-how-to-enable-219-or-wider-mode/
2) Download The.Quarry.Ultrawide.v1.2.zip
3) Unpack archive anywhere you want
4) Start the game
5) Open The Quarry Ultrawide v1.2.exe
6) Press F9 to enable or disable ultrawide mode.

I hope you have found this guide useful, I will be glad if you like and rate it. See you soon :)