Baba Hari Dass (Devanagari: बाबा हरि दास) (26 March 1923 – 25 September 2018) was an Indian yoga master, silent monk, temple builder, and commentator of Indian scriptural traditions of dharma and moksha. He was classically trained in the Ashtanga of Patanjali (also known as Rāja yoga), as well as Kriya yoga, Ayurveda, Samkhya, Tantra, Vedanta, and Sanskrit.
Baba Hari Dass took a vow of silence in 1952, which he upheld through this life. Although he did not speak, he was able to communicate in several languages through writing. His literary output included scriptural commentaries to the Yoga Sutras of Patanjali, the Bhagavad Gita, Samkhya Karika, and Vedanta, collections of aphorisms about the meaning and purpose of life, essays, plays, short stories, children's stories, kirtan, mantras, and in-depth instructional yoga materials that formed the basis of a yoga certification-training program.
Upon his arrival in North America in early 1971, Baba Hari Dass and his teachings inspired the creation of several yoga centers and retreat programs in the United States in Santa Cruz County, California, and in Canada at Salt Spring Island and in Toronto. He was an early proponent of Ayurveda, an ancient Indian system of health and healing, and helped introduce the practice to the United States.
In an annual rendition of the Indian epic Ramayana, he taught performing arts, choreography and costume making. Baba Hari Dass devoted himself to helping others, with an emphasis on selfless service (karma yoga); In 1987 he opened Sri Ram Orphanage for homeless children in Haridwar, India. To the local population of Nainital and Almora, Baba Hari Dass was also known as Haridas (lit "servant of Lord Hari"), Haridas Baba, Chota Maharaji (literally "little great king"), or Harda Baba.
Hari Datt Karnatak was born on 26 March 1923 in the town of Almora in Uttarakhand, India. His family was of a Kumaoni Brahmin Karnatak lineage. Hari Datt was born in the lunar month of Chaitra, in Shukla Paksha (Rama Navami).