Go to Gunayin Temple. Just after the temple with the white wolf is another shirne with Bamboo Grove Back Hills
From there its a fairly straightforward path. Ofcourse there are some enemies along the way you are free to fight or skip until you reach the place with shrine hidden behind an elite enemy. Once you beat him the Bamboo Grove Snake Trial will be free to rest at.
If you take the stairs besides it you will find an old man who will let you retrieve lost spirits.