We just returned from a Boston to California Amtrak trip. Our first stop was Riverside, CA which is home to the amazing Mission Inn. We stayed at the Courtyard Marriott the first night and took a taxi to the Mission Inn the next day. What a beautiful inn- it is more than an inn-it is a huge historic inn with courtyards, several restaurants, a spa, and a large collection of paintings and pottery. It is also right next to a town promenade with all kinds of shops and eateries. Google the Mission Inn to see how amazing it is. A stay there requires a minimum of 2 nights, so we happily stayed at the Courtyard which is well run. Riverside, CA- a good one night stopover on the way to LA and beyond.