Phu Tub Berk, sometimes also spelt Phu Tubberg, can be found in Phetchabun province. Phetchabun is in the lower part of northern Thailand. Phu Tub Berk is the tallest mountain within the province, with a height of almost 1,800 metres. As you journey higher up the mountain you can feel the temperature getting cooler and cooler – make sure you take a sweater, especially if you are planning on spending the night at one of the campsites on the mountainside!