Every season offers new reasons to get outside and explore--if visitors know when and where to go. This guide provides all the infomation readers need to plan 52 great outdoor adventures--from excursions for the serious naturalist to casual outings for the entire family. Northern California Nature Weekends is keyed to the best times to visit. Outdoor enthusiasts will find information about travel, natural history, and fun-filled activities. This guide not only helps travelers explore the outdoors any time of year, but also includes a handful of indoor adventures for those days when the weather just won't cooperate.