From my head on greeting card sites
The Blue mountain cards company was started in the early 1970s by Boulder, Colorado couple Stephen Schutz and Susan Polis Schutz as a vehicle for their hobbies (illustration for Stephen, poetry for Susan). They combined Stephens artwork and Susans free form poetry to create posters expressing their shared feelings about life, love and nature, which was very much in keeping with the hippie culture of the time. Blue Mountain was originally conceived as a poster print business after Stephen and Susan persuaded a local Boulder bookseller to sell several of their prints on consignment. The popularity of the posters convinced Stephen and Susan to offer them to other stores in the area, and the business soon took off. Blue Mountain Arts, parent company of Blue Mountain Cards, was officially formed in 1971.