"Why are mountains so funny? Because they're…

“Why are mountains so funny? Because they’re hill areas” is a hilarious pun that has been printed on many images. The joke was posted by Dave Lee on Twitter on July 14, 2011.

Twitter
Dave Lee
‏@davelee
Why are mountains so funny? Because they’re hill areas.
11:41 AM - 14 Jul 2011 from Wandsworth, England

Twitter
Sam Holl
‏@samholl
Oh, christ… (I love it) RT @davelee: Why are mountains so funny? Because they’re hill areas.
11:48 AM - 14 Jul 2011

Twitter
Peter Moncrieff
‏@breakoutpete
Mountains aren’t funny. They’re hill areas.
2:05 PM - 27 Apr 2012

26 June 2013, The Advertiser (Adelaide, Australia), “Mouthing Off” by Marty Smith, pg. 22:
Riddle: Why are mountains so funny? Because they’re hill areas.

Google Books
Best Ever Classroom Jokes:
Because some of us never grow up
By Mike Haskins
New York, NY: Pavilion Books
2015
Pg. ?:
Why are mountains so funny?
Because they’re hill areas.

Reddit—Jokes
Why are mountains so funny?
submitted February 16, 2015 by T0tai
Because they are hill areas.
I’ll show myself out

Reddit—Jokes
Mountain’s aren’t funny…
submitted October 9, 2016 by Pyronaut44
They’re hill areas.

Reddit—Dadjokes
Mountains aren’t just funny (self.dadjokes)
submitted October 11, 2016 by PKMKII
They’re hill areas.