One of the first yoga schools in San Francisco and the first Iyengar teacher training program in the US, the Iyengar Yoga Institute of San Francisco (IYISF) has trained thousands of students and teachers from around the world since its establishment in 1974. IYISF is recognized for its tradition of excellence by offering students a comprehensive curriculum that provides a challenging, profound, and rewarding learning experience in the hatha and ashtanga yoga traditions as taught by B.K.S. Iyengar.