そろそろ

そろそろ寝ます

I'm gonna go to bed now.

I'll go to bed soon.

I should go to bed now.

It's about time to go to bed.

It's time to go to bed.

そろそろ（It's about)

It's about the race event of Mt Ooyama in Isehara City that I told you before.

It's about time to enter the race through Runnet. 

そろそろ（未来形で表す）