How to get to Okukino Hot Spring

hi we are going to stay at one of the onsen there, how to get there from Nikko. We will buy Nikko wide area pass? is it going to be covered by the pass? thank you.

THis will be our first time to explore after staying in Tokyo for 3 days. Any suggestion will be much appreciated.

Era

I assume you mean Okukinu.
https://www.japan-guide.com/e/e3883.html

The Nikko All Area Pass is valid as far as Shin-Fujiwara, but not beyond.