Nevada City keeps the brick main street the gold rush built, and in Grass Valley the headframe at Empire Mine still stands over the old workings, beside the owner's stone house and its gardens. These are the Sierra foothill towns up CA-49 past Auburn, and a week among them out of Roseville parks the rig by the water at Rollins Lake or under the pines above Lions Lake. The car handles the days, and the rig stays put until you head home.
The week works because nothing gets packed up. With full hookups under the rig, the air conditioning carries through a hot foothill afternoon and the kids have their own bathroom. Give one morning of the week to Empire Mine State Historic Park, which runs guided tours of the grounds.
Save one long day for Malakoff Diggins State Historic Park, north of Nevada City, where hydraulic miners turned water cannons on the ridge until the hillside washed away. What they left is a pit walled in red and cream cliffs, cut into gullies and spires, and past the rim the old town of North Bloomfield keeps a street of false-front buildings from the same years. The park's Chute Hill campground caps trailers at 19 feet, so the car does this day while the rig waits at its base. A two-person trip that wants to wake up beside the pit can size down to something built for small sites.
Rollins Lake and the Grass Valley fairgrounds
In summer the base moves to the shore of Rollins Lake, a foothill reservoir with four campgrounds and boat launches around it. For a motorhome, Long Ravine and Orchard Springs are the ones to book, and the district lists full hookups and a dump station at Long Ravine and at Orchard Springs.
Outside lake season, or on a trip that wants the towns closer, the Nevada County Fairgrounds RV Park keeps the rig in Grass Valley, its loops shaded by pines above Lions Lake. It has full hookup and water-electric sites, and it puts Empire Mine and downtown Grass Valley in the same easy afternoon.
Scotts Flat Lake above Nevada City
A slower week parks at Scotts Flat Lake, a reservoir at about 3,000 feet in the pines above Nevada City. The plan is the shoreline and not much else, which suits a family that has already done the towns and wants the last days quiet.
The Nevada Irrigation District runs RV sites and dump stations there, open year-round with the summer season from early May into early October, and it lists no hookups. Fill the fresh tank before you arrive and dump on site on the way out. If a longer stay needs a reset, a hookup night at Long Ravine or the fairgrounds splits the week.
After the 2027 season the district plans a multi-year Gate 1 closure to rebuild the spillway. Check which loops are taking reservations before you book the site, and book the site before the rig.
If the Nevada County lakes are full, Lake Oroville's Loafer Creek, north on CA-70 and off CA-162, is the next foothill lake for a parked week. Higher up, Lake Tahoe is its own big-rig trip, and the Truckee RV page covers it.