Where online can one make California hotel reservations?

* Expedia: Expedia is one of the largest online travel agencies in the world, and it offers a wide variety of hotel options in California. You can search for hotels by city, price, amenities, and more.

* Booking.com: Booking.com is another popular online travel agency that offers a wide selection of hotels in California. You can search for hotels by city, price, amenities, and more.

* Hotels.com: Hotels.com is a website that specializes in hotel bookings. You can search for hotels by city, price, amenities, and more.

* Agoda: Agoda is a website that offers hotel bookings in Asia, Europe, and the Americas. You can search for hotels by city, price, amenities, and more.

* TripAdvisor: TripAdvisor is a travel website that offers user reviews and ratings of hotels, restaurants, and attractions. You can use TripAdvisor to find the best hotels in California based on the reviews of other travelers.