Are the Calories burned on the system correct?

I have been off and on this site for a couple of years. Funny thing is that every time I use the site it works, and then I quit? But I have been noticing that it seems like the calories burned is really high. For instance we went on a family hike on the 4th of July and the app said I burned almost 2000 calories on a two hour hike? I am a big guy I know, but that seems really high. I am looking for some feedback to see if anyone else has had the same thoughts.