From Ubud main street, look for the side board of Shriman at Jalan Subak Sok Wayah, keep walking uphill till you find 2 paths. Follow the small path leading to the rice fields. keep walking till 350 meters, then you can find the mural of balinese lady and monkeys, take left from there, right before Molecha Warung, keep walking till you find Shriman Narayan Yoga.