Finding the Diablo 2 Resurrected Barracks is one of those “right under your nose” scenarios.
The Monastery itself might not have clear signposting, but there’s a simple way to find it. Just make sure you’re prepared for some grueling fights before you get there.
It’s easy to get lost on the way to the monastery, but finding it is surprisingly simple. You just have to stick to the road. Make your way through the Black Marshes, and follow the road. That eventually leads you to the Tamoe Highlands, and the road through Tamoe Highlands takes you to the Rogue Monastery gates.