In May 2017 the Forest Selfness guide Katarina Čuk attended training for forest therapy guides in Northern California, USA with the globally acclaimed Association for Nature and Forest Therapy Guides and Programs. The training is based on the decades of scientific research , traditional knowledge and experience on the healing power of natural, especially forest environments, as well as the global trends and vast repertoire of knowledge on preventive health, psychology and personal growth, naturalistic knowledge and environmental science. It took place in the Sugarloaf Ridge State Park with beautiful mixed forests, while the participants also got to practice in a sequoia forest, in a botanical garden, a Japanese garden, on the mountain ridge trails and gorgeous meadows. After the training intensive each participant went to their home natural environment for a 6-months mentored praxis. After the praxis Katarina gained the first certificate for a Forest Therapy Guide in Slovenia.