The Sierra Madre is a mountain range in the Philippines. It is the longest in the country and runs the eastern length of Luzon island. It starts in the province of Cagayan in the north and ends in Quezon in the south, just east of Laguna de Bay. It tails to the west as it reaches the progvince of Nueva Vizcaya to form the Caraballo Mountains, with which it sticks with the Cordillera Mountain range. Several of the range's mountains, like Mount Mirador are spectacular. Quezon National Forest Park is situated in this range.