Ruth Clark (Woodcraft name: Minobi, meaning Glad Heart)[1] (29 November 1899 – 2 October 1964) was the author of the first woodcraft book for girls[2] and an active original member of the Kibbo Kift.

[3] Clark authored and illustrated Camp Fire Training for Girls, the first woodcraft book for girls.

She was the leader of The Merrie Campers group of woodcraft girls.

[1] She was a co-founder of the Kibbo Kift and incorporated her girls into it, but was not involved in the Green Shirt Movement for Social Credit.

Clark and Hargrave "parted company"[4] in the early 1930s and were divorced in the 1950s.