There is virtually no taxi service in the north. Bemos use Singaraja as a hub, but aren't useful for getting to small, secluded villages. Visitors rely on hired cars and drivers from the south.
You have several options for approaching north Bali. From the south, the obvious route is to take the main road from Denpasar, pass Lake Bratan, towards Singaraja. The road passes through hillside terraces of vegetables and fruits climbing to about 1,200m (3,937 ft.). The east route approaches via Tulamben or past Mount Batur. The last route, by the west tends to be congested with lorries ferrying workers on their way around Bali or back to Java. However if you turn off the main western road at Antosari, this will take you through the foothills of Mount Batukaru, through stunning picturesque paddy fields up through Pupuan, best known for its coffee and clove plantations.