The Kluay Mai Cliff - Heo Suwat Waterfall Nature Trail Project at Khao Yai National Park in Commemoration of the 160^th Anniversary of Thai-German Friendship is a tripartite collaboration amongst the Department of National Parks (DNP), Wildlife and Plant Conservation under the Ministry of Natural Resources and Environment, the German Embassy in Thailand, the Amata Foundation, with support from Amata B.Grimm Power company. Initiated in 2021, the project focuses on developing a 3.4-kilometre nature trail that has been in operation for over 30 years. The primary objective is to ensure the trail is safe, accessible, and compliant with academic ecosystem conservation principles while strictly avoiding environmental disturbance, such as refraining from cutting timber within the forest and selecting appropriate external materials.

The trail connects the Pha Kluai Mai and Haew Suwat waterfalls and is one of seven nature trails within Khao Yai National Park. Suitable for visitors of all ages, the trail serves as an "outdoor classroom" featuring interpretive signage that educates the public on flora, fauna, and geological features. Key highlights include natural water-slowing vegetation, ancient lava flows, and indicator species of environmental health, such as the Chinese Water Dragon.

In 2025, B.Grimm Power maintained its commitment to the project by collaborating with Khao Yai National Park officials to conduct additional surveys and trail improvements. Following the approval of the repair budget, a new contractor was appointed to prioritise infrastructure upgrades at both trailheads and within the trail itself. This phase also includes the preparation of additional interpretive signage, which is currently in the production process.

By the end of 2025, the trail improvement works reached 70 percent completion of the total project plan. This progress reflects B.Grimm Power’s steadfast dedication to the continuous development of natural learning resources, the promotion of eco-tourism, and the fostering of long-term environmental awareness among the public.