Heo Narok Waterfall is a natural wonder located on the southern side of Khao Yai National Park, within Nakhon Nayok province. It is renowned as the tallest and largest waterfall in the park, consisting of three massive tiers, with each tier being at least 50 meters high, resulting in a total drop of approximately 150 meters. The enormous volume of water cascading down the steep cliff creates a roaring sound echoing throughout the valley, leading to its name "Heo Narok," which translates to a chasm or abyss with a sound like hell. The beauty and grandeur of this waterfall are most apparent during the rainy season, when the water volume is at its peak.

Accessing the waterfall requires some effort, including an approximately 1-kilometer walk from the parking area along a paved path. However, this is followed by a section of descending relatively steep stairs to the first-tier viewpoint (about 50 meters). Although challenging, it is well worth the effort to witness the breathtaking view of the water plunging into the abyss below. Heo Narok Waterfall is a destination that attracts those who seek to experience the raw power of nature and witness the splendor of a magnificent waterfall. While swimming is not permitted, it is a place that offers an awe-inspiring experience and a good physical workout.

• Private Car: Use Thanarat Road (Khao Yai entrance from Pak Chong side) or Highway 3077 (Nakhon Nayok side) heading towards the Heo Narok Waterfall office point, which is the southern entrance of Khao Yai National Park.

• Within the Park: The waterfall is located inside Khao Yai National Park. Follow the signs to the Heo Narok Waterfall parking lot.

• Best Time to Visit: The rainy season (approximately June - October) is when the waterfall has the most water and is at its most spectacular, but the paths can be slippery, so extra caution is advised.

• Gear and Health: Wear appropriate footwear for hiking/climbing stairs, and bring drinking water, inhalers, or a small fan, as the climb up and down the steep stairs can be strenuous.

• Safety Precautions: Swimming is not permitted, and extreme caution should be taken around the viewpoint and stairs due to potential accidents.

• Preparation: Heo Narok Waterfall is part of Khao Yai National Park; prepare the national park entrance fee in advance.

Admission Fee (Khao Yai National Park):

• Thai Nationals: Adult 40 THB, Child 20 THB

• Foreign Visitors: Adult 400 THB, Child 200 THB

Opening Hours:

• Open for visitors: 06:00 AM - 06:00 PM