Sleeping Place in the Mountains?

[question]

So, I just got up to the Mountains with Brambleclaw, Squirrelflight, and Talon. 
I've skipped through Screech's dialogue of where I need to sleep to progress the story, so I don't know where I need to go.
I'm in the to-bes den. Where do I go to sleep?

[Mistyfoot!!!]

In the to-bes den, there are three piles of leaves on the left. It is the middle pile.

[question]

Ah, okay! Thank you!