Look for it in the lowest part of your map, to the right of Rocksmore Ravine.
Emerald Valley Map can be crafted in Beorn in Golden Canyon. The Emerald Valley map must be crafted to open this area.
You must have reached Emerald Valley to see this land on your map.
Remember: you don't need to rush, this land won't disappear, so take your time and enjoy the expedition at your own pace