1. San Francisco Bay is a large natural harbor and estuary located in northern California. It spans over 400 square miles and is surrounded by the cities of San Francisco, Oakland, and San Jose. The bay is known for its iconic red Golden Gate Bridge, Alcatraz Island, and Angel Island State Park. It is also home to numerous species of marine life such as harbor seals, sea lions, and dolphins. The bay is a major shipping and transportation hub for the region and has a rich history dating back to the indigenous Ohlone people.

2. The bay itself is accessible 24/7, but specific attractions surrounding it have varying hours. Here are some phone numbers for popular attractions near San Francisco Bay:

- Golden Gate Bridge: (415) 921-5858

- Alcatraz Island: (415) 981-7625

- Angel Island State Park: (415) 435-5390

- San Francisco Bay Trail: 1-877-725-4881

3. There are several ways to access San Francisco Bay, including by car, ferry, and public transportation. Here are some ticket and transportation options:

- Golden Gate Bridge toll: $6-8 depending on the time of day and method of payment (cash or FasTrak).

- Alcatraz Island ferry tickets: $41.20 for adults, $24.50 for children (ages 5-11), free for children under 4. Advanced reservations are recommended.

- Angel Island State Park ferry tickets: $15 for adults, $14 for seniors (ages 65+), $11 for children (ages 6-17), free for children under 5. Reservations are recommended.

- San Francisco Bay Ferry: ticket prices vary depending on the route. For example, a one-way ticket from San Francisco to Vallejo costs $16.50 for adults, $8.25 for children/seniors/disabled.