The wonder and reverence that Boulder’s Dr. Oakleigh Thorne II sees in the natural world has been his lifelong guide. He created non-profit organizations such as Thorne Films, the Thorne Ecological Institute and the Thorne Nature Experience, and achieved success through community action long before the EPA and the modern environmental movement. He has directly contributed to the environmental education of thousands of students, and they are his enduring legacy. This extraordinary 93-year-old man continues to mentor young people and spread loving environmental consciousness, and with his astounding musical skills, still plays the piano and arranges a cappella music for choral groups. Mighty Oak is a fascinating portrait of this extraordinary environmental pioneer, educator and activist.