Where is the games save file located?

[Toastbrot]

Where can I find the save file of the game?

[Satoru]

c:\users\<username>\appdata\locallow\campsanto\firewatch\saves

[sean-o]

C:\Users\YOURUSERNAME\AppData\LocalLow\CampoSanto\Firewatch\saves

Be sure you can see hidden files on Windows.

[Ogoshi_TR]

Vanaman, please read my topic:

http://steamcommunity.com/app/383870/discussions/0/412446292776838237/

[Kzin [UK]]

No need to bother with "yourusername", just enter this:
%LocalAppData%Low\CampoSanto\Firewatch\saves