After hearing two favorable weather reports on the single side band radio nets we set north from San Pedro Martir headed for Kino station. shortly after leaving the anchorage conditions built to 15 to 20 knots out of the north west which was unexpected but welcome as it allowed us to sail at a good clip on the exact heading we were trying to make. As we came up on the south end of Isla Tiburon we started to get wind and wave effect quickly building out of the north where conditions are funneled down the eastern shore of Tiburon. This is where things started to get a little crazy. Just as the sun was setting to a moonless night we started to get some of the steepest seas I have ever seen. We had a reef in the Mainsail and were just talking about switching to a smaller jib when we lost the foot of the main and tore the sail at two of the reef points. After switching to full storm sails we continued to beat into a furious sea sometimes taking waves right into the cockpit and sometimes riding up waves so steep it felt like we were climbing a vertical wall. Needless to say it was a relief to arrive at Kino and row ashore to some warm showers and dry beds.