KTEL Andros has up to nine buses daily (fewer on weekends) linking Gavrio and Hora (€4, 55 minutes) via Batsi (€2, 15 minutes), and Gavrio and Korthi (€5, 1¼ hours, two to three daily). Schedules are posted at the bus stops in Gavrio and Hora. Low-season buses are usually timed to meet Rafina ferries.
Taxis from Gavrio to Batsi cost about €12, and to Hora €40.
Roads can be rough and narrow, but many walking paths and sights are only accessible by car. Escape in Andros can arrange to meet you at the port with a rental car (from about €40 per day in August, €25 in low season). There are a couple of scooter and ATV rental agencies on the waterfront in Gavrio.