Heading north out of Sacramento on Interstate 5, the goal is to base camp in Redding, the Shasta Cascade's largest city. One of the top sights includes the iconic Sundial Bridge, spanning the Sacramento River. It bisects a paved, 16-mile, dog-friendly trail that eventually leads to Shasta Dam. Redding prides itself as “California’s Trail Capital,” with 225 miles of trails within a 15-mile radius of town. Search trails and download a map here. Read more.