The 3km-long trail from the national park’s visitors’ centre to Tham Pha Kradan Lek involves some steep ascents, especially the section between the level four of Chat Trakan Waterfalls and the ridge of the mountain. Once you reachthe ridge, it’s easy. Just before the said section, you need to cross the stream. Be very careful because the rocks nderwater are slippery. Also, it’s wise to take off your shoes and socks and keep them dry, unless you enjoy trekking with soggy footwear.