The most popular and efficient way to get to Pena Palace from the Sintra town center or train station is by taking the 434 "Circuito da Pena" tourist bus. This bus runs in a one-way loop specifically designed to climb the steep, winding mountain roads that lead to the palace and the Moorish Castle. In 2026, a 24-hour hop-on-hop-off ticket costs around €15, while a simple round trip is about €8. It is highly recommended to take the bus because the walk from town is a grueling, 45-minute uphill trek that is not for the faint of heart. Other options include taking a tuk-tuk (which costs about €15–€20 per person) or an Uber/Bolt (around €10–€15), though cars often get stuck in the heavy traffic that clogs the narrow roads during peak hours. You should strictly avoid driving your own rental car to the palace, as there is almost zero public parking at the top, and local police frequently close the road to private vehicles to prevent gridlock.