Even during the summer high season, Sierra County, home to fewer than 4,000 souls, is off the beaten track for most Northern California travelers. In fall, it can feel like your own private realm. Pack a suitcase, pop Max and Moxie into the car and embark on a 170-mile loop trip along the Yuba-Donner Scenic Byway to explore this rugged, less-visited part of Gold Country. The first part of the route springs north from Interstate 80 to follow Highway 49  through Grass Valley and Nevada City. From there it charts a winding, 44-mile course to Downieville, one of the hands-down most charming, history-steeped  towns in the Mother Lode. The rushing North Yuba River is scenic centerpiece for pet-friendly lodging at places including Sierra Streamside Cabins, the Lure Resort, Riverside Inn and Downieville Loft. Read more.