Along the Cactus Trail: The drive from Riverside, California to Phoenix, Arizona is affectionately known as the Cactus Trail. Starting in Riverside, sights of note include: the Mission Inn in Riverside whose unique style was the brainchild of Frank Miller; the Chapel of St. Francis in Riverside, which because of its dedication to aviation is the site of many weddings associated with aviators; the Camelback Mountain outside of Phoenix, so named for its shape.