Jane Huber, author of “60 Hikes Within 60 Miles: San Francisco,” has the most extensive online guide to Bay Area hikes at bahiker.com. The site includes recommendations based on time of year, has a page of hikes sorted by difficulty, and includes links to just about every park in the Bay Area.
Jane also has a discussion board for even more local hiking-related content.
If you’re thinking of building a site about local hikes in your neck of the woods, bahiker.com is a good point for comparison.