“How do mountains stay warm?”/“Snowcaps.”

A mountain riddle is:
 
Q: How do mountains stay warm?
A: Snowcaps.
 
The joke has been cited in print since at least 2015.
   
“How do mountains hear?”/“With mountaineers” and “How do mountains see?”/“They peak” are related riddles.
       
 
Twitter
Eric Rosenbeck
@EricRosenbeck
J.o.D. – How do mountains keep their ears warm in the winter? – They wear snowcaps
8:04 AM · May 5, 2015·Twitter Web Client
   
Twitter
Wansbeck Dental Spa
@wansbeckdental
Joke Time!
How do mountains stay warm in winter?
Snowcaps.
6:30 AM · Nov 13, 2015·Facebook
   
Twitter
JJ Crystal Tiger
@JJCrystalT
How do mountains stay warm in winter?
Snowcaps
3:56 PM · Sep 12, 2016·Twitter Web Client
   
Twitter
Victoria Guthrie
@Runningmummypig
Replying to @Runningmummypig and @uzi1892
how do mountains stay warm in winter? Snowcaps
6:39 AM · Dec 24, 2016·Twitter for iPhone
   
Twitter
Brandon Spinner WAFF
@wxSpinner89
How do mountains stay warm in winter?
Snowcaps.
GIF
7:25 AM · Dec 1, 2017·Twitter Web Client
 
Google Books
Joke-tionary Jokes:
More Than 444 Jokes for Kids
By Thomas Nelson
Nashville, TN: Thomas Nelson
2019
Pg. 24:
Q: How do mountains stay warm in winter?
A: They wear their snow caps
 
Facebook
For the Love of Dirt
November 29, 2020 at 7:23 PM ·
How do mountains stay warm?
Snowcaps