Point Reyes National Seashore has 150+ miles of hiking trails with exceptional views of the coastline. Many trails have dozens of wildflowers in spring and summer. Parking is free and multiple campsites are available.

Best Months to Visit: Summers are best. In winters, it's too cool and windy.

Notes:

1. If you're going to explore Point Reyes extensively, you should consider buying the Map by Tom Harrison (at REI). This map is high quality, with mileage for various sections of trails clearly marked.
2. For adventure on unmarked trails, secret beaches and difficult terrain, check out Point Reyes - Secret Places & Magic Moments by Phil Arnot (1993, 224 pages).
3. For multi-day trips, you may camp or stay at Point Reyes Hostel. Romantic getaways in bed and breakfast inns at Inverness, CA, are also attractive.
4. If you're keen to hike to other waterfalls nearby or are a fan of waterfall photography, check out the amazing website: Leon Turnbull Photography: WaterfallsWest.com.
5. These maps have more details: Bolinas Ridge — Tomales Bay — Beaches — Full Park Map.
6. A park employee told me that Point Reyes Beach in the north-west is about 4 miles long. However, it's always windy and you have to keep an eye on the ocean for 'sleeper waves' which can pull you into the ocean. On the other hand, Drakes Beach is always calm and quiet - in fact, you can swim and there are showers for post-swimming cleanup.
7. Tide Tables for Point Reyes, CA
8. Helpful: Backpacking Notes by Tom Mangan.
9. Geology: Point Reyes - nice description by Ted Konigsmark at GeologicTrips.
10. Car Camping: Olema Ranch.