Campgrounds and RV parks near Arnold, CA

The headline draw is Calaveras Big Trees State Park, with the North and South Grove trails winding through giant sequoias, plus swimming and fishing along the Stanislaus River. Park activities also include guided hikes, interpretive programs, wildlife viewing, and winter activities. Highway 4 climbs east into the Stanislaus National Forest for hiking, mountain biking, and access to alpine lakes. South of Arnold, day trips reach Columbia State Historic Park, a preserved living gold rush town, Railtown 1897 State Historic Park with steam train rides, and Indian Grinding Rock State Historic Park, plus Moaning Caverns and New Melones Lake for boating and fishing. Murphys and Angels Camp add wine tasting and small-town stops within easy reach.

Arnold has a four-season mountain climate. Summers are warm, arid, and mostly clear, and winters are long, very cold, wet, and partly cloudy, with July highs near 84°F and almost no rainfall June through August. This is peak RV season: weekday traffic is lighter, while weekends fill quickly at both state-park and private campgrounds. Spring brings the heaviest precipitation. March is the wettest month, with rain on roughly 11 days and totals near 6 inches, plus significant snow at higher elevations. Wildflowers emerge in the meadows by May, but expect muddy trails and cold nights through April. Snow can persist on shaded ground into late spring along Highway 4 above town. Fall is generally clear and cooler, with September one of the driest months and color in the dogwoods and black oaks through October. By November, freezing nights return. Winter is long, cold, and snowy. Calaveras Big Trees stays open for day use and winter recreation, but Oak Hollow is open May 15 to October 1, while North Grove has limited first-come, first-served sites November through May. Chain controls are common on Highway 4 east of Arnold.

Inside Calaveras Big Trees State Park, sites are dry camping with no hookups, though an RV dump station is available elsewhere in the park, capped at 30-foot RVs, and equipped with picnic table, fire ring, and bear-proof food locker. Restrooms include token showers and running water. All RVs and vehicles with trailers must take Rock Creek Road, even if GPS says to use Mosquito Road, since they cannot cross the single-lane Mosquito Bridge. Bears and yellow jackets are present, so food storage rules are strictly enforced. Private resorts in the area offer full hookups, laundry, and camp stores, with Golden Pines fitting RVs up to 40 feet on several sites and one site up to 45 feet. Cell service is limited, with Verizon and T-Mobile working at Golden Pines but most other carriers not. Firewood should be purchased locally to limit pest transport, and campfire restrictions are common in late summer.