Premiere Active Vacations in the San Juan Islands Since 1993. Crystal Seas Kayaking specializes in guided 3 hour, full day, sunset and multi-day kayaking and multi-sport trips in Washington’s sunny San Juan Islands – mid March through mid October. The perfect adventure for singles, couples, groups, and families – no experience is necessary. We are locally owned and operated by second generation islanders on San Juan Island and proudly support local businesses, organizations, schools and small farms. Besides the incredible scenery and wildlife, our guides are a huge part of why you will love your trip. The majority of our staff are locals who majored in science or recreation and all of them have an infectious love and knowledge of the outdoors. They are all naturalists who are CPR and First Aid certified and many are also Wilderness First Responders.